49991879 has 24 divisors (see below), whose sum is σ = 60451488. Its totient is φ = 40472640.

The previous prime is 49991873. The next prime is 49991891. The reversal of 49991879 is 97819994.

It is not a de Polignac number, because 49991879 - 2¹² = 49987783 is a prime.

It is a super-3 number, since 3×49991879³ (a number of 24 digits) contains 333 as substring.

Its product of digits (1469664) is a multiple of the sum of its prime divisors (168).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (49991873) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 819509 + ... + 819569.

It is an arithmetic number, because the mean of its divisors is an integer number (2518812).

Almost surely, 2^49991879 is an apocalyptic number.

49991879 is a deficient number, since it is larger than the sum of its proper divisors (10459609).

49991879 is an equidigital number, since it uses as much as digits as its factorization.

49991879 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 215 (or 168 counting only the distinct ones).

The product of its digits is 1469664, while the sum is 56.

The square root of 49991879 is about 7070.4935471295. The cubic root of 49991879 is about 368.3832034376.

The spelling of 49991879 in words is "forty-nine million, nine hundred ninety-one thousand, eight hundred seventy-nine".