45139397 has 2 divisors, whose sum is σ = 45139398. Its totient is φ = 45139396.

The previous prime is 45139361. The next prime is 45139429. The reversal of 45139397 is 79393154.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25060036 + 20079361 = 5006^2 + 4481^2 .

It is a cyclic number.

It is not a de Polignac number, because 45139397 - 2⁸ = 45139141 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (45139357) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22569698 + 22569699.

It is an arithmetic number, because the mean of its divisors is an integer number (22569699).

Almost surely, 2^45139397 is an apocalyptic number.

It is an amenable number.

45139397 is a deficient number, since it is larger than the sum of its proper divisors (1).

45139397 is an equidigital number, since it uses as much as digits as its factorization.

45139397 is an evil number, because the sum of its binary digits is even.

The product of its digits is 102060, while the sum is 41.

The square root of 45139397 is about 6718.5859375318. The cubic root of 45139397 is about 356.0562261275.

The spelling of 45139397 in words is "forty-five million, one hundred thirty-nine thousand, three hundred ninety-seven".