23678639 has 2 divisors, whose sum is σ = 23678640. Its totient is φ = 23678638.

The previous prime is 23678623. The next prime is 23678653. The reversal of 23678639 is 93687632.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 23678639 - 2⁴ = 23678623 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 23678639.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23678659) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11839319 + 11839320.

It is an arithmetic number, because the mean of its divisors is an integer number (11839320).

Almost surely, 2^23678639 is an apocalyptic number.

23678639 is a deficient number, since it is larger than the sum of its proper divisors (1).

23678639 is an equidigital number, since it uses as much as digits as its factorization.

23678639 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 326592, while the sum is 44.

The square root of 23678639 is about 4866.0701803406. The cubic root of 23678639 is about 287.1566724610.

The spelling of 23678639 in words is "twenty-three million, six hundred seventy-eight thousand, six hundred thirty-nine".