45139147 has 2 divisors, whose sum is σ = 45139148. Its totient is φ = 45139146.

The previous prime is 45139141. The next prime is 45139151. The reversal of 45139147 is 74193154.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-45139147 is a prime.

It is not a weakly prime, because it can be changed into another prime (45139141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22569573 + 22569574.

It is an arithmetic number, because the mean of its divisors is an integer number (22569574).

Almost surely, 2^45139147 is an apocalyptic number.

45139147 is a deficient number, since it is larger than the sum of its proper divisors (1).

45139147 is an equidigital number, since it uses as much as digits as its factorization.

45139147 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15120, while the sum is 34.

The square root of 45139147 is about 6718.5673324006. The cubic root of 45139147 is about 356.0555687991.

The spelling of 45139147 in words is "forty-five million, one hundred thirty-nine thousand, one hundred forty-seven".