45400639 has 2 divisors, whose sum is σ = 45400640. Its totient is φ = 45400638.

The previous prime is 45400627. The next prime is 45400657. The reversal of 45400639 is 93600454.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 45400639 - 2²⁵ = 11846207 is a prime.

It is a super-2 number, since 2×45400639² = 4122436043216642, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 45400639.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (45400669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22700319 + 22700320.

It is an arithmetic number, because the mean of its divisors is an integer number (22700320).

Almost surely, 2^45400639 is an apocalyptic number.

45400639 is a deficient number, since it is larger than the sum of its proper divisors (1).

45400639 is an equidigital number, since it uses as much as digits as its factorization.

45400639 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12960, while the sum is 31.

The square root of 45400639 is about 6737.9996289700. Note that the first 3 decimals coincide. The cubic root of 45400639 is about 356.7417911261.

The spelling of 45400639 in words is "forty-five million, four hundred thousand, six hundred thirty-nine".