977920797 has 16 divisors (see below), whose sum is σ = 1492936832. Its totient is φ = 557772480.

The previous prime is 977920789. The next prime is 977920799. The reversal of 977920797 is 797029779.

It is not a de Polignac number, because 977920797 - 2³ = 977920789 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (977920799) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31678 + ... + 54399.

It is an arithmetic number, because the mean of its divisors is an integer number (93308552).

Almost surely, 2^977920797 is an apocalyptic number.

It is an amenable number.

977920797 is a deficient number, since it is larger than the sum of its proper divisors (515016035).

977920797 is a wasteful number, since it uses less digits than its factorization.

977920797 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86628.

The product of its (nonzero) digits is 3500658, while the sum is 57.

The square root of 977920797 is about 31271.7252002508. The cubic root of 977920797 is about 992.5854256279.

The spelling of 977920797 in words is "nine hundred seventy-seven million, nine hundred twenty thousand, seven hundred ninety-seven".