977983389779 has 4 divisors (see below), whose sum is σ = 1066890970680. Its totient is φ = 889075808880.

The previous prime is 977983389743. The next prime is 977983389853.

977983389779 is nontrivially palindromic in base 10.

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 977983389779 - 2¹⁶ = 977983324243 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 977983389779.

It is not an unprimeable number, because it can be changed into a prime (977983389709) 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, 44453790434 + ... + 44453790455.

It is an arithmetic number, because the mean of its divisors is an integer number (266722742670).

Almost surely, 2^977983389779 is an apocalyptic number.

977983389779 is a deficient number, since it is larger than the sum of its proper divisors (88907580901).

977983389779 is a wasteful number, since it uses less digits than its factorization.

977983389779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88907580900.

The product of its digits is 9073705536, while the sum is 86.

The spelling of 977983389779 in words is "nine hundred seventy-seven billion, nine hundred eighty-three million, three hundred eighty-nine thousand, seven hundred seventy-nine".