23501539 has 2 divisors, whose sum is σ = 23501540. Its totient is φ = 23501538.

The previous prime is 23501507. The next prime is 23501557. The reversal of 23501539 is 93510532.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 23501539 - 2⁵ = 23501507 is a prime.

It is not a weakly prime, because it can be changed into another prime (23502539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11750769 + 11750770.

It is an arithmetic number, because the mean of its divisors is an integer number (11750770).

Almost surely, 2^23501539 is an apocalyptic number.

23501539 is a deficient number, since it is larger than the sum of its proper divisors (1).

23501539 is an equidigital number, since it uses as much as digits as its factorization.

23501539 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4050, while the sum is 28.

The square root of 23501539 is about 4847.8385905473. The cubic root of 23501539 is about 286.4389684279.

The spelling of 23501539 in words is "twenty-three million, five hundred one thousand, five hundred thirty-nine".