49878979 has 2 divisors, whose sum is σ = 49878980. Its totient is φ = 49878978.

The previous prime is 49878967. The next prime is 49879073. The reversal of 49878979 is 97987894.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 49878979 - 2⁵ = 49878947 is a prime.

It is not a weakly prime, because it can be changed into another prime (49878379) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24939489 + 24939490.

It is an arithmetic number, because the mean of its divisors is an integer number (24939490).

Almost surely, 2^49878979 is an apocalyptic number.

49878979 is a deficient number, since it is larger than the sum of its proper divisors (1).

49878979 is an equidigital number, since it uses as much as digits as its factorization.

49878979 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9144576, while the sum is 61.

The square root of 49878979 is about 7062.5051504406. The cubic root of 49878979 is about 368.1056796165.

The spelling of 49878979 in words is "forty-nine million, eight hundred seventy-eight thousand, nine hundred seventy-nine".