49999791 has 4 divisors (see below), whose sum is σ = 66666392. Its totient is φ = 33333192.

The previous prime is 49999783. The next prime is 49999801. The reversal of 49999791 is 19799994.

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

It is not a de Polignac number, because 49999791 - 2³ = 49999783 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (49999711) 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, 8333296 + ... + 8333301.

It is an arithmetic number, because the mean of its divisors is an integer number (16666598).

Almost surely, 2^49999791 is an apocalyptic number.

49999791 is a deficient number, since it is larger than the sum of its proper divisors (16666601).

49999791 is a wasteful number, since it uses less digits than its factorization.

49999791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16666600.

The product of its digits is 1653372, while the sum is 57.

The square root of 49999791 is about 7071.0530333183. The cubic root of 49999791 is about 368.4026365549.

The spelling of 49999791 in words is "forty-nine million, nine hundred ninety-nine thousand, seven hundred ninety-one".