23505539 has 2 divisors, whose sum is σ = 23505540. Its totient is φ = 23505538.

The previous prime is 23505497. The next prime is 23505551. The reversal of 23505539 is 93550532.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 23505539 - 2¹⁶ = 23440003 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (23501539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11752769 + 11752770.

It is an arithmetic number, because the mean of its divisors is an integer number (11752770).

Almost surely, 2^23505539 is an apocalyptic number.

23505539 is a deficient number, since it is larger than the sum of its proper divisors (1).

23505539 is an equidigital number, since it uses as much as digits as its factorization.

23505539 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20250, while the sum is 32.

The square root of 23505539 is about 4848.2511279842. The cubic root of 23505539 is about 286.4552182981.

The spelling of 23505539 in words is "twenty-three million, five hundred five thousand, five hundred thirty-nine".