977989997351 has 4 divisors (see below), whose sum is σ = 977993350104. Its totient is φ = 977986644600.

The previous prime is 977989997317. The next prime is 977989997363. The reversal of 977989997351 is 153799989779.

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

It is a cyclic number.

It is not a de Polignac number, because 977989997351 - 2²⁶ = 977922888487 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 977989997351.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (977989997951) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1192220 + ... + 1837761.

It is an arithmetic number, because the mean of its divisors is an integer number (244498337526).

Almost surely, 2^977989997351 is an apocalyptic number.

977989997351 is a deficient number, since it is larger than the sum of its proper divisors (3352753).

977989997351 is a wasteful number, since it uses less digits than its factorization.

977989997351 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3352752.

The product of its digits is 2430456840, while the sum is 83.

The spelling of 977989997351 in words is "nine hundred seventy-seven billion, nine hundred eighty-nine million, nine hundred ninety-seven thousand, three hundred fifty-one".