49990399 has 2 divisors, whose sum is σ = 49990400. Its totient is φ = 49990398.

The previous prime is 49990373. The next prime is 49990427. The reversal of 49990399 is 99309994.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 49990399 - 2²¹ = 47893247 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (49996399) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24995199 + 24995200.

It is an arithmetic number, because the mean of its divisors is an integer number (24995200).

Almost surely, 2^49990399 is an apocalyptic number.

49990399 is a deficient number, since it is larger than the sum of its proper divisors (1).

49990399 is an equidigital number, since it uses as much as digits as its factorization.

49990399 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 708588, while the sum is 52.

The square root of 49990399 is about 7070.3888860515. The cubic root of 49990399 is about 368.3795680970.

The spelling of 49990399 in words is "forty-nine million, nine hundred ninety thousand, three hundred ninety-nine".