23477257 has 4 divisors (see below), whose sum is σ = 23510020. Its totient is φ = 23444496.

The previous prime is 23477249. The next prime is 23477263. The reversal of 23477257 is 75277432.

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

It can be written as a sum of positive squares in 2 ways, for example, as 10653696 + 12823561 = 3264^2 + 3581^2 .

It is a cyclic number.

It is not a de Polignac number, because 23477257 - 2³ = 23477249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23477057) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15282 + ... + 16747.

It is an arithmetic number, because the mean of its divisors is an integer number (5877505).

Almost surely, 2^23477257 is an apocalyptic number.

It is an amenable number.

23477257 is a deficient number, since it is larger than the sum of its proper divisors (32763).

23477257 is an equidigital number, since it uses as much as digits as its factorization.

23477257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32762.

The product of its digits is 82320, while the sum is 37.

The square root of 23477257 is about 4845.3335282517. Note that the first 3 decimals coincide. The cubic root of 23477257 is about 286.3402839993.

It can be divided in two parts, 2347 and 7257, that added together give a square (9604 = 98²).

The spelling of 23477257 in words is "twenty-three million, four hundred seventy-seven thousand, two hundred fifty-seven".