49791661 has 4 divisors (see below), whose sum is σ = 50493024. Its totient is φ = 49090300.

The previous prime is 49791629. The next prime is 49791667. The reversal of 49791661 is 16619794.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 49791661 - 2⁵ = 49791629 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 (49791667) 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, 350575 + ... + 350716.

It is an arithmetic number, because the mean of its divisors is an integer number (12623256).

Almost surely, 2^49791661 is an apocalyptic number.

It is an amenable number.

49791661 is a deficient number, since it is larger than the sum of its proper divisors (701363).

49791661 is an equidigital number, since it uses as much as digits as its factorization.

49791661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 701362.

The product of its digits is 81648, while the sum is 43.

The square root of 49791661 is about 7056.3206418076. The cubic root of 49791661 is about 367.8907525625.

The spelling of 49791661 in words is "forty-nine million, seven hundred ninety-one thousand, six hundred sixty-one".