104566639 has 2 divisors, whose sum is σ = 104566640. Its totient is φ = 104566638.

The previous prime is 104566621. The next prime is 104566661. The reversal of 104566639 is 936665401.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 104566639 - 2²¹ = 102469487 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (104563639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52283319 + 52283320.

It is an arithmetic number, because the mean of its divisors is an integer number (52283320).

Almost surely, 2^104566639 is an apocalyptic number.

104566639 is a deficient number, since it is larger than the sum of its proper divisors (1).

104566639 is an equidigital number, since it uses as much as digits as its factorization.

104566639 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 116640, while the sum is 40.

The square root of 104566639 is about 10225.7830507008. The cubic root of 104566639 is about 471.1194666924.

The spelling of 104566639 in words is "one hundred four million, five hundred sixty-six thousand, six hundred thirty-nine".