257772923 has 4 divisors (see below), whose sum is σ = 259108728. Its totient is φ = 256437120.

The previous prime is 257772899. The next prime is 257772929. The reversal of 257772923 is 329277752.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 257772923 - 2⁸ = 257772667 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (257772929) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 667613 + ... + 667998.

It is an arithmetic number, because the mean of its divisors is an integer number (64777182).

Almost surely, 2^257772923 is an apocalyptic number.

257772923 is a deficient number, since it is larger than the sum of its proper divisors (1335805).

257772923 is a wasteful number, since it uses less digits than its factorization.

257772923 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1335804.

The product of its digits is 370440, while the sum is 44.

The square root of 257772923 is about 16055.3082499216. The cubic root of 257772923 is about 636.4228519497.

It can be divided in two parts, 2577729 and 23, that added together give a palindrome (2577752).

The spelling of 257772923 in words is "two hundred fifty-seven million, seven hundred seventy-two thousand, nine hundred twenty-three".