49307139 has 24 divisors (see below), whose sum is σ = 82434560. Its totient is φ = 27816048.

The previous prime is 49307117. The next prime is 49307149. The reversal of 49307139 is 93170394.

It is not a de Polignac number, because 49307139 - 2⁸ = 49306883 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (49307149) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 24 + ... + 9930.

Almost surely, 2^49307139 is an apocalyptic number.

49307139 is a deficient number, since it is larger than the sum of its proper divisors (33127421).

49307139 is a wasteful number, since it uses less digits than its factorization.

49307139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9999 (or 9996 counting only the distinct ones).

The product of its (nonzero) digits is 20412, while the sum is 36.

The square root of 49307139 is about 7021.9042289111. The cubic root of 49307139 is about 366.6935474324.

The spelling of 49307139 in words is "forty-nine million, three hundred seven thousand, one hundred thirty-nine".