979856475129 has 27 divisors (see below), whose sum is σ = 1646460435087. Its totient is φ = 559906107264.

The previous prime is 979856475119. The next prime is 979856475133. The reversal of 979856475129 is 921574658979.

The square root of 979856475129 is 989877.

It is a perfect power (a square), and thus also a powerful number.

979856475129 is a `hidden beast` number, since 9 + 7 + 9 + 8 + 564 + 7 + 51 + 2 + 9 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1039095225 + 978817379904 = 32235^2 + 989352^2 .

It is not a de Polignac number, because 979856475129 - 2¹⁵ = 979856442361 is a prime.

It is not an unprimeable number, because it can be changed into a prime (979856475119) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 20763849 + ... + 20810985.

Almost surely, 2^979856475129 is an apocalyptic number.

979856475129 is the 989877-th square number.

979856475129 is the 494939-th centered octagonal number.

It is an amenable number.

979856475129 is a deficient number, since it is larger than the sum of its proper divisors (666603959958).

979856475129 is an frugal number, since it uses more digits than its factorization.

979856475129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94294 (or 47147 counting only the distinct ones).

The product of its digits is 342921600, while the sum is 72.

The spelling of 979856475129 in words is "nine hundred seventy-nine billion, eight hundred fifty-six million, four hundred seventy-five thousand, one hundred twenty-nine".