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12380977 = 72376829
BaseRepresentation
bin101111001110…
…101100110001
3212022000111201
4233032230301
511132142402
61121211201
7210144100
oct57165461
925260451
1012380977
116a97014
124190b01
13274652b
141904037
151148687
hexbceb31

12380977 has 12 divisors (see below), whose sum is σ = 14793780. Its totient is φ = 10323936.

The previous prime is 12380971. The next prime is 12381011. The reversal of 12380977 is 77908321.

12380977 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 9144576 + 3236401 = 3024^2 + 1799^2 .

It is not a de Polignac number, because 12380977 - 215 = 12348209 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12380971) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1602 + ... + 5227.

It is an arithmetic number, because the mean of its divisors is an integer number (1232815).

Almost surely, 212380977 is an apocalyptic number.

12380977 is the 2032-nd hex number.

It is an amenable number.

12380977 is a deficient number, since it is larger than the sum of its proper divisors (2412803).

12380977 is an equidigital number, since it uses as much as digits as its factorization.

12380977 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6880 (or 6873 counting only the distinct ones).

The product of its (nonzero) digits is 21168, while the sum is 37.

The square root of 12380977 is about 3518.6612511010. The cubic root of 12380977 is about 231.3404835099.

The spelling of 12380977 in words is "twelve million, three hundred eighty thousand, nine hundred seventy-seven".

Divisors: 1 7 37 49 259 1813 6829 47803 252673 334621 1768711 12380977