977216679 has 24 divisors (see below), whose sum is σ = 1421757792. Its totient is φ = 646778880.

The previous prime is 977216677. The next prime is 977216687. The reversal of 977216679 is 976612779.

It is a happy number.

It is not a de Polignac number, because 977216679 - 2¹ = 977216677 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (977216677) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1343814 + ... + 1344540.

It is an arithmetic number, because the mean of its divisors is an integer number (59239908).

Almost surely, 2^977216679 is an apocalyptic number.

977216679 is a deficient number, since it is larger than the sum of its proper divisors (444541113).

977216679 is a wasteful number, since it uses less digits than its factorization.

977216679 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1607 (or 1604 counting only the distinct ones).

The product of its digits is 2000376, while the sum is 54.

The square root of 977216679 is about 31260.4651117030. The cubic root of 977216679 is about 992.3471428437.

The spelling of 977216679 in words is "nine hundred seventy-seven million, two hundred sixteen thousand, six hundred seventy-nine".