40604639 has 2 divisors, whose sum is σ = 40604640. Its totient is φ = 40604638.

The previous prime is 40604633. The next prime is 40604659. The reversal of 40604639 is 93640604.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 40604639 - 2⁴ = 40604623 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40604633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20302319 + 20302320.

It is an arithmetic number, because the mean of its divisors is an integer number (20302320).

Almost surely, 2^40604639 is an apocalyptic number.

40604639 is a deficient number, since it is larger than the sum of its proper divisors (1).

40604639 is an equidigital number, since it uses as much as digits as its factorization.

40604639 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15552, while the sum is 32.

The square root of 40604639 is about 6372.1769435570. The cubic root of 40604639 is about 343.7097758333.

The spelling of 40604639 in words is "forty million, six hundred four thousand, six hundred thirty-nine".