23149757 has 2 divisors, whose sum is σ = 23149758. Its totient is φ = 23149756.

The previous prime is 23149741. The next prime is 23149759. The reversal of 23149757 is 75794132.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22080601 + 1069156 = 4699^2 + 1034^2 .

It is a cyclic number.

It is not a de Polignac number, because 23149757 - 2⁴ = 23149741 is a prime.

It is a super-2 number, since 2×23149757² = 1071822498318098, which contains 22 as substring.

Together with 23149759, it forms a pair of twin primes.

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 23149757.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23149759) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11574878 + 11574879.

It is an arithmetic number, because the mean of its divisors is an integer number (11574879).

Almost surely, 2^23149757 is an apocalyptic number.

It is an amenable number.

23149757 is a deficient number, since it is larger than the sum of its proper divisors (1).

23149757 is an equidigital number, since it uses as much as digits as its factorization.

23149757 is an evil number, because the sum of its binary digits is even.

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

The square root of 23149757 is about 4811.4194371308. The cubic root of 23149757 is about 285.0025935949.

The spelling of 23149757 in words is "twenty-three million, one hundred forty-nine thousand, seven hundred fifty-seven".