49969979 has 4 divisors (see below), whose sum is σ = 49988376. Its totient is φ = 49951584.

The previous prime is 49969951. The next prime is 49970009. The reversal of 49969979 is 97996994.

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

It is a cyclic number.

It is not a de Polignac number, because 49969979 - 2⁸ = 49969723 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (49969079) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4229 + ... + 10854.

It is an arithmetic number, because the mean of its divisors is an integer number (12497094).

Almost surely, 2^49969979 is an apocalyptic number.

49969979 is a deficient number, since it is larger than the sum of its proper divisors (18397).

49969979 is a wasteful number, since it uses less digits than its factorization.

49969979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18396.

The product of its digits is 9920232, while the sum is 62.

The square root of 49969979 is about 7068.9446878583. The cubic root of 49969979 is about 368.3294028959.

The spelling of 49969979 in words is "forty-nine million, nine hundred sixty-nine thousand, nine hundred seventy-nine".