49979909 has 8 divisors (see below), whose sum is σ = 57163008. Its totient is φ = 42807600.

The previous prime is 49979893. The next prime is 49979921. The reversal of 49979909 is 90997994.

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 49979909 - 2⁴ = 49979893 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (49979939) 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, 14939 + ... + 17975.

It is an arithmetic number, because the mean of its divisors is an integer number (7145376).

Almost surely, 2^49979909 is an apocalyptic number.

It is an amenable number.

49979909 is a deficient number, since it is larger than the sum of its proper divisors (7183099).

49979909 is a wasteful number, since it uses less digits than its factorization.

49979909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5395.

The product of its (nonzero) digits is 1653372, while the sum is 56.

The square root of 49979909 is about 7069.6470208915. The cubic root of 49979909 is about 368.3537993355.

It can be divided in two parts, 499 and 79909, that added together give a palindrome (80408).

The spelling of 49979909 in words is "forty-nine million, nine hundred seventy-nine thousand, nine hundred nine".