23547157 has 2 divisors, whose sum is σ = 23547158. Its totient is φ = 23547156.

The previous prime is 23547131. The next prime is 23547163. The reversal of 23547157 is 75174532.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16370116 + 7177041 = 4046^2 + 2679^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23547157 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23547127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11773578 + 11773579.

It is an arithmetic number, because the mean of its divisors is an integer number (11773579).

Almost surely, 2^23547157 is an apocalyptic number.

It is an amenable number.

23547157 is a deficient number, since it is larger than the sum of its proper divisors (1).

23547157 is an equidigital number, since it uses as much as digits as its factorization.

23547157 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 29400, while the sum is 34.

The square root of 23547157 is about 4852.5412929722. The cubic root of 23547157 is about 286.6241808018.

The spelling of 23547157 in words is "twenty-three million, five hundred forty-seven thousand, one hundred fifty-seven".