23904157 has 2 divisors, whose sum is σ = 23904158. Its totient is φ = 23904156.

The previous prime is 23904151. The next prime is 23904187. The reversal of 23904157 is 75140932.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13734436 + 10169721 = 3706^2 + 3189^2 .

It is a cyclic number.

It is not a de Polignac number, because 23904157 - 2⁷ = 23904029 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23904151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11952078 + 11952079.

It is an arithmetic number, because the mean of its divisors is an integer number (11952079).

Almost surely, 2^23904157 is an apocalyptic number.

It is an amenable number.

23904157 is a deficient number, since it is larger than the sum of its proper divisors (1).

23904157 is an equidigital number, since it uses as much as digits as its factorization.

23904157 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7560, while the sum is 31.

The square root of 23904157 is about 4889.1877648542. The cubic root of 23904157 is about 288.0654308962.

The spelling of 23904157 in words is "twenty-three million, nine hundred four thousand, one hundred fifty-seven".