49139999 has 2 divisors, whose sum is σ = 49140000. Its totient is φ = 49139998.

The previous prime is 49139977. The next prime is 49140031. The reversal of 49139999 is 99993194.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 49139999 - 2¹⁶ = 49074463 is a prime.

It is a Chen prime.

49139999 is a modest number, since divided by 9999 gives 4913 as remainder.

It is a self number, because there is not a number n which added to its sum of digits gives 49139999.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (49139939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24569999 + 24570000.

It is an arithmetic number, because the mean of its divisors is an integer number (24570000).

Almost surely, 2^49139999 is an apocalyptic number.

49139999 is a deficient number, since it is larger than the sum of its proper divisors (1).

49139999 is an equidigital number, since it uses as much as digits as its factorization.

49139999 is an evil number, because the sum of its binary digits is even.

The product of its digits is 708588, while the sum is 53.

The square root of 49139999 is about 7009.9927960020. The cubic root of 49139999 is about 366.2787424394.

The spelling of 49139999 in words is "forty-nine million, one hundred thirty-nine thousand, nine hundred ninety-nine".