23206639 has 2 divisors, whose sum is σ = 23206640. Its totient is φ = 23206638.

The previous prime is 23206637. The next prime is 23206643. The reversal of 23206639 is 93660232.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 23206639 - 2¹ = 23206637 is a prime.

Together with 23206637, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 23206639.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23206637) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11603319 + 11603320.

It is an arithmetic number, because the mean of its divisors is an integer number (11603320).

Almost surely, 2^23206639 is an apocalyptic number.

23206639 is a deficient number, since it is larger than the sum of its proper divisors (1).

23206639 is an equidigital number, since it uses as much as digits as its factorization.

23206639 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11664, while the sum is 31.

The square root of 23206639 is about 4817.3269558958. The cubic root of 23206639 is about 285.2358322949.

The spelling of 23206639 in words is "twenty-three million, two hundred six thousand, six hundred thirty-nine".