77923977 has 8 divisors (see below), whose sum is σ = 108416064. Its totient is φ = 49690608.

The previous prime is 77923973. The next prime is 77923999. The reversal of 77923977 is 77932977.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 77923977 - 2² = 77923973 is a prime.

It is not an unprimeable number, because it can be changed into a prime (77923973) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 564598 + ... + 564735.

It is an arithmetic number, because the mean of its divisors is an integer number (13552008).

Almost surely, 2^77923977 is an apocalyptic number.

It is an amenable number.

77923977 is a deficient number, since it is larger than the sum of its proper divisors (30492087).

77923977 is a wasteful number, since it uses less digits than its factorization.

77923977 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1129359.

The product of its digits is 1166886, while the sum is 51.

The square root of 77923977 is about 8827.4558622516. The cubic root of 77923977 is about 427.1270109402.

The spelling of 77923977 in words is "seventy-seven million, nine hundred twenty-three thousand, nine hundred seventy-seven".