49931899 has 2 divisors, whose sum is σ = 49931900. Its totient is φ = 49931898.

The previous prime is 49931897. The next prime is 49931909. The reversal of 49931899 is 99813994.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 49931899 - 2¹ = 49931897 is a prime.

Together with 49931897, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (49931897) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24965949 + 24965950.

It is an arithmetic number, because the mean of its divisors is an integer number (24965950).

Almost surely, 2^49931899 is an apocalyptic number.

49931899 is a deficient number, since it is larger than the sum of its proper divisors (1).

49931899 is an equidigital number, since it uses as much as digits as its factorization.

49931899 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 49931899 is about 7066.2507031664. The cubic root of 49931899 is about 368.2358163845.

The spelling of 49931899 in words is "forty-nine million, nine hundred thirty-one thousand, eight hundred ninety-nine".