49997999 has 2 divisors, whose sum is σ = 49998000. Its totient is φ = 49997998.

The previous prime is 49997977. The next prime is 49998007. The reversal of 49997999 is 99979994.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-49997999 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (49997399) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24998999 + 24999000.

It is an arithmetic number, because the mean of its divisors is an integer number (24999000).

Almost surely, 2^49997999 is an apocalyptic number.

49997999 is a deficient number, since it is larger than the sum of its proper divisors (1).

49997999 is an equidigital number, since it uses as much as digits as its factorization.

49997999 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 14880348, while the sum is 65.

The square root of 49997999 is about 7070.9263183829. The cubic root of 49997999 is about 368.3982353005.

The spelling of 49997999 in words is "forty-nine million, nine hundred ninety-seven thousand, nine hundred ninety-nine".