49391979 has 32 divisors (see below), whose sum is σ = 81500160. Its totient is φ = 25909632.

The previous prime is 49391939. The next prime is 49392011. The reversal of 49391979 is 97919394.

It is not a de Polignac number, because 49391979 - 2¹⁶ = 49326443 is a prime.

It is not an unprimeable number, because it can be changed into a prime (49391939) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 64869 + ... + 65625.

It is an arithmetic number, because the mean of its divisors is an integer number (2546880).

Almost surely, 2^49391979 is an apocalyptic number.

49391979 is a deficient number, since it is larger than the sum of its proper divisors (32108181).

49391979 is a wasteful number, since it uses less digits than its factorization.

49391979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1019.

The product of its digits is 551124, while the sum is 51.

The square root of 49391979 is about 7027.9427288503. The cubic root of 49391979 is about 366.9037431904.

The spelling of 49391979 in words is "forty-nine million, three hundred ninety-one thousand, nine hundred seventy-nine".