977813579069 has 4 divisors (see below), whose sum is σ = 979440557340. Its totient is φ = 976186600800.

The previous prime is 977813579063. The next prime is 977813579087. The reversal of 977813579069 is 960975318779.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 615499873444 + 362313705625 = 784538^2 + 601925^2 .

It is a cyclic number.

It is not a de Polignac number, because 977813579069 - 2³⁶ = 909094102333 is a prime.

It is a super-2 number, since 2×977813579069² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 977813578993 and 977813579011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (977813579063) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 813488234 + ... + 813489435.

It is an arithmetic number, because the mean of its divisors is an integer number (244860139335).

Almost surely, 2^977813579069 is an apocalyptic number.

It is an amenable number.

977813579069 is a deficient number, since it is larger than the sum of its proper divisors (1626978271).

977813579069 is a wasteful number, since it uses less digits than its factorization.

977813579069 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1626978270.

The product of its (nonzero) digits is 180033840, while the sum is 71.

The spelling of 977813579069 in words is "nine hundred seventy-seven billion, eight hundred thirteen million, five hundred seventy-nine thousand, sixty-nine".