77132979 has 80 divisors (see below), whose sum is σ = 146361600. Its totient is φ = 39320640.

The previous prime is 77132977. The next prime is 77132981. The reversal of 77132979 is 97923177.

It is an interprime number because it is at equal distance from previous prime (77132977) and next prime (77132981).

It is not a de Polignac number, because 77132979 - 2¹ = 77132977 is a prime.

It is not an unprimeable number, because it can be changed into a prime (77132977) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 517597 + ... + 517745.

It is an arithmetic number, because the mean of its divisors is an integer number (1829520).

Almost surely, 2^77132979 is an apocalyptic number.

77132979 is a deficient number, since it is larger than the sum of its proper divisors (69228621).

77132979 is a wasteful number, since it uses less digits than its factorization.

77132979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 262 (or 253 counting only the distinct ones).

The product of its digits is 166698, while the sum is 45.

The square root of 77132979 is about 8782.5383005143. The cubic root of 77132979 is about 425.6768527329.

The spelling of 77132979 in words is "seventy-seven million, one hundred thirty-two thousand, nine hundred seventy-nine".