312776923 has 2 divisors, whose sum is σ = 312776924. Its totient is φ = 312776922.

The previous prime is 312776921. The next prime is 312776927. The reversal of 312776923 is 329677213.

It is a weak prime.

It is an emirp because it is prime and its reverse (329677213) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 312776923 - 2¹ = 312776921 is a prime.

It is a super-2 number, since 2×312776923² = 195658807122695858, which contains 22 as substring.

Together with 312776921, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (312776921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156388461 + 156388462.

It is an arithmetic number, because the mean of its divisors is an integer number (156388462).

Almost surely, 2^312776923 is an apocalyptic number.

312776923 is a deficient number, since it is larger than the sum of its proper divisors (1).

312776923 is an equidigital number, since it uses as much as digits as its factorization.

312776923 is an evil number, because the sum of its binary digits is even.

The product of its digits is 95256, while the sum is 40.

The square root of 312776923 is about 17685.5003604648. The cubic root of 312776923 is about 678.8047942135.

The spelling of 312776923 in words is "three hundred twelve million, seven hundred seventy-six thousand, nine hundred twenty-three".