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11977 = 72959
BaseRepresentation
bin10111011001001
3121102121
42323021
5340402
6131241
746630
oct27311
917377
1011977
118aa9
126b21
1355b4
144517
153837
hex2ec9

11977 has 8 divisors (see below), whose sum is σ = 14400. Its totient is φ = 9744.

The previous prime is 11971. The next prime is 11981. The reversal of 11977 is 77911.

11977 = T13 + T14 + ... + T41.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 11977 - 23 = 11969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11971) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 174 + ... + 232.

It is an arithmetic number, because the mean of its divisors is an integer number (1800).

211977 is an apocalyptic number.

It is an amenable number.

11977 is a deficient number, since it is larger than the sum of its proper divisors (2423).

11977 is an equidigital number, since it uses as much as digits as its factorization.

11977 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95.

The product of its digits is 441, while the sum is 25.

The square root of 11977 is about 109.4394809929. The cubic root of 11977 is about 22.8796485919.

It can be divided in two parts, 119 and 77, that added together give a square (196 = 142).

The spelling of 11977 in words is "eleven thousand, nine hundred seventy-seven".

Divisors: 1 7 29 59 203 413 1711 11977