45318139 has 2 divisors, whose sum is σ = 45318140. Its totient is φ = 45318138.

The previous prime is 45318131. The next prime is 45318149. The reversal of 45318139 is 93181354.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 45318139 - 2³ = 45318131 is a prime.

It is not a weakly prime, because it can be changed into another prime (45318131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22659069 + 22659070.

It is an arithmetic number, because the mean of its divisors is an integer number (22659070).

Almost surely, 2^45318139 is an apocalyptic number.

45318139 is a deficient number, since it is larger than the sum of its proper divisors (1).

45318139 is an equidigital number, since it uses as much as digits as its factorization.

45318139 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12960, while the sum is 34.

The square root of 45318139 is about 6731.8748502925. The cubic root of 45318139 is about 356.5255750592.

The spelling of 45318139 in words is "forty-five million, three hundred eighteen thousand, one hundred thirty-nine".