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12980831 = 97163821
BaseRepresentation
bin110001100001…
…001001011111
3220102111100112
4301201021133
511310341311
61142120235
7215222663
oct61411137
926374315
1012980831
117366766
12442007b
1328c6586
141a1c8a3
15121628b
hexc6125f

12980831 has 8 divisors (see below), whose sum is σ = 13211184. Its totient is φ = 12752640.

The previous prime is 12980783. The next prime is 12980837. The reversal of 12980831 is 13808921.

12980831 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 12980831 - 222 = 8786527 is a prime.

It is a super-2 number, since 2×129808312 = 337003946901122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12980837) 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, 15401 + ... + 16221.

It is an arithmetic number, because the mean of its divisors is an integer number (1651398).

Almost surely, 212980831 is an apocalyptic number.

12980831 is a deficient number, since it is larger than the sum of its proper divisors (230353).

12980831 is an equidigital number, since it uses as much as digits as its factorization.

12980831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1081.

The product of its (nonzero) digits is 3456, while the sum is 32.

The square root of 12980831 is about 3602.8920327981. The cubic root of 12980831 is about 235.0178408064.

The spelling of 12980831 in words is "twelve million, nine hundred eighty thousand, eight hundred thirty-one".

Divisors: 1 97 163 821 15811 79637 133823 12980831