23455639 has 2 divisors, whose sum is σ = 23455640. Its totient is φ = 23455638.

The previous prime is 23455603. The next prime is 23455657. The reversal of 23455639 is 93655432.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 23455639 - 2¹³ = 23447447 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 23455598 and 23455607.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23455739) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11727819 + 11727820.

It is an arithmetic number, because the mean of its divisors is an integer number (11727820).

Almost surely, 2^23455639 is an apocalyptic number.

23455639 is a deficient number, since it is larger than the sum of its proper divisors (1).

23455639 is an equidigital number, since it uses as much as digits as its factorization.

23455639 is an evil number, because the sum of its binary digits is even.

The product of its digits is 97200, while the sum is 37.

The square root of 23455639 is about 4843.1022082958. The cubic root of 23455639 is about 286.2523690555.

The spelling of 23455639 in words is "twenty-three million, four hundred fifty-five thousand, six hundred thirty-nine".