23749157 has 2 divisors, whose sum is σ = 23749158. Its totient is φ = 23749156.

The previous prime is 23749139. The next prime is 23749169. The reversal of 23749157 is 75194732.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21585316 + 2163841 = 4646^2 + 1471^2 .

It is a cyclic number.

It is not a de Polignac number, because 23749157 - 2¹⁴ = 23732773 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 23749157.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23749177) 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 as a sum of consecutive naturals, namely, 11874578 + 11874579.

It is an arithmetic number, because the mean of its divisors is an integer number (11874579).

Almost surely, 2^23749157 is an apocalyptic number.

It is an amenable number.

23749157 is a deficient number, since it is larger than the sum of its proper divisors (1).

23749157 is an equidigital number, since it uses as much as digits as its factorization.

23749157 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 52920, while the sum is 38.

The square root of 23749157 is about 4873.3106816619. The cubic root of 23749157 is about 287.4414529805.

It can be divided in two parts, 237 and 49157, that added together give a palindrome (49394).

The spelling of 23749157 in words is "twenty-three million, seven hundred forty-nine thousand, one hundred fifty-seven".