49739979 has 4 divisors (see below), whose sum is σ = 66319976. Its totient is φ = 33159984.

The previous prime is 49739953. The next prime is 49739981. The reversal of 49739979 is 97993794.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 49739979 - 2⁵ = 49739947 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (49739999) 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 in 3 ways as a sum of consecutive naturals, for example, 8289994 + ... + 8289999.

It is an arithmetic number, because the mean of its divisors is an integer number (16579994).

Almost surely, 2^49739979 is an apocalyptic number.

49739979 is a deficient number, since it is larger than the sum of its proper divisors (16579997).

49739979 is a wasteful number, since it uses less digits than its factorization.

49739979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16579996.

The product of its digits is 3857868, while the sum is 57.

The square root of 49739979 is about 7052.6575842019. The cubic root of 49739979 is about 367.7634225928.

The spelling of 49739979 in words is "forty-nine million, seven hundred thirty-nine thousand, nine hundred seventy-nine".