49999879 has 4 divisors (see below), whose sum is σ = 50116320. Its totient is φ = 49883440.

The previous prime is 49999877. The next prime is 49999883. The reversal of 49999879 is 97899994.

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 49999879 - 2¹ = 49999877 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 49999879.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (49999877) 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, 57574 + ... + 58435.

It is an arithmetic number, because the mean of its divisors is an integer number (12529080).

Almost surely, 2^49999879 is an apocalyptic number.

49999879 is a deficient number, since it is larger than the sum of its proper divisors (116441).

49999879 is a wasteful number, since it uses less digits than its factorization.

49999879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116440.

The product of its digits is 13226976, while the sum is 64.

The square root of 49999879 is about 7071.0592558682. The cubic root of 49999879 is about 368.4028526853.

It can be divided in two parts, 4999 and 9879, that added together give a triangular number (14878 = T₁₇₂).

The spelling of 49999879 in words is "forty-nine million, nine hundred ninety-nine thousand, eight hundred seventy-nine".