45665639 has 2 divisors, whose sum is σ = 45665640. Its totient is φ = 45665638.

The previous prime is 45665629. The next prime is 45665651. The reversal of 45665639 is 93656654.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 45665639 - 2²⁰ = 44617063 is a 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 45665639.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (45665629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22832819 + 22832820.

It is an arithmetic number, because the mean of its divisors is an integer number (22832820).

Almost surely, 2^45665639 is an apocalyptic number.

45665639 is a deficient number, since it is larger than the sum of its proper divisors (1).

45665639 is an equidigital number, since it uses as much as digits as its factorization.

45665639 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 583200, while the sum is 44.

The square root of 45665639 is about 6757.6356072224. The cubic root of 45665639 is about 357.4345364020.

The spelling of 45665639 in words is "forty-five million, six hundred sixty-five thousand, six hundred thirty-nine".