23159749 has 2 divisors, whose sum is σ = 23159750. Its totient is φ = 23159748.

The previous prime is 23159737. The next prime is 23159771. The reversal of 23159749 is 94795132.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20657025 + 2502724 = 4545^2 + 1582^2 .

It is a cyclic number.

It is not a de Polignac number, because 23159749 - 2¹⁵ = 23126981 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23159779) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11579874 + 11579875.

It is an arithmetic number, because the mean of its divisors is an integer number (11579875).

Almost surely, 2^23159749 is an apocalyptic number.

It is an amenable number.

23159749 is a deficient number, since it is larger than the sum of its proper divisors (1).

23159749 is an equidigital number, since it uses as much as digits as its factorization.

23159749 is an evil number, because the sum of its binary digits is even.

The product of its digits is 68040, while the sum is 40.

The square root of 23159749 is about 4812.4576881257. The cubic root of 23159749 is about 285.0435923881.

The spelling of 23159749 in words is "twenty-three million, one hundred fifty-nine thousand, seven hundred forty-nine".