49899139 has 2 divisors, whose sum is σ = 49899140. Its totient is φ = 49899138.

The previous prime is 49899133. The next prime is 49899203. The reversal of 49899139 is 93199894.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 49899139 - 2⁵ = 49899107 is a prime.

It is not a weakly prime, because it can be changed into another prime (49899133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24949569 + 24949570.

It is an arithmetic number, because the mean of its divisors is an integer number (24949570).

Almost surely, 2^49899139 is an apocalyptic number.

49899139 is a deficient number, since it is larger than the sum of its proper divisors (1).

49899139 is an equidigital number, since it uses as much as digits as its factorization.

49899139 is an evil number, because the sum of its binary digits is even.

The product of its digits is 629856, while the sum is 52.

The square root of 49899139 is about 7063.9322618496. The cubic root of 49899139 is about 368.1552663767.

The spelling of 49899139 in words is "forty-nine million, eight hundred ninety-nine thousand, one hundred thirty-nine".