77945923 has 16 divisors (see below), whose sum is σ = 90144000. Its totient is φ = 66653280.

The previous prime is 77945897. The next prime is 77945927. The reversal of 77945923 is 32954977.

It is a cyclic number.

It is not a de Polignac number, because 77945923 - 2⁵ = 77945891 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77945927) 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, 29890 + ... + 32392.

It is an arithmetic number, because the mean of its divisors is an integer number (5634000).

Almost surely, 2^77945923 is an apocalyptic number.

77945923 is a deficient number, since it is larger than the sum of its proper divisors (12198077).

77945923 is a wasteful number, since it uses less digits than its factorization.

77945923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2682.

The product of its digits is 476280, while the sum is 46.

The square root of 77945923 is about 8828.6988282532. The cubic root of 77945923 is about 427.1671049305.

It can be divided in two parts, 77 and 945923, that added together give a triangular number (946000 = T₁₃₇₅).

The spelling of 77945923 in words is "seventy-seven million, nine hundred forty-five thousand, nine hundred twenty-three".