49999979 has 8 divisors (see below), whose sum is σ = 50466240. Its totient is φ = 49536256.

The previous prime is 49999921. The next prime is 49999991. The reversal of 49999979 is 97999994.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 49999979 - 2²⁰ = 48951403 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (49939979) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 69182 + ... + 69900.

It is an arithmetic number, because the mean of its divisors is an integer number (6308280).

Almost surely, 2^49999979 is an apocalyptic number.

49999979 is a deficient number, since it is larger than the sum of its proper divisors (466261).

49999979 is a wasteful number, since it uses less digits than its factorization.

49999979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1269.

The product of its digits is 14880348, while the sum is 65.

The square root of 49999979 is about 7071.0663269411. The cubic root of 49999979 is about 368.4030982876.

The spelling of 49999979 in words is "forty-nine million, nine hundred ninety-nine thousand, nine hundred seventy-nine".