77856923 has 8 divisors (see below), whose sum is σ = 83789280. Its totient is φ = 72074880.

The previous prime is 77856901. The next prime is 77856929. The reversal of 77856923 is 32965877.

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

It is a cyclic number.

It is not a de Polignac number, because 77856923 - 2⁶ = 77856859 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77856929) 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, 36503 + ... + 38576.

It is an arithmetic number, because the mean of its divisors is an integer number (10473660).

Almost surely, 2^77856923 is an apocalyptic number.

77856923 is a deficient number, since it is larger than the sum of its proper divisors (5932357).

77856923 is a wasteful number, since it uses less digits than its factorization.

77856923 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75157.

The product of its digits is 635040, while the sum is 47.

The square root of 77856923 is about 8823.6570082931. The cubic root of 77856923 is about 427.0044607541.

The spelling of 77856923 in words is "seventy-seven million, eight hundred fifty-six thousand, nine hundred twenty-three".