49191121 has 4 divisors (see below), whose sum is σ = 56218432. Its totient is φ = 42163812.

The previous prime is 49191113. The next prime is 49191139. The reversal of 49191121 is 12119194.

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 49191121 - 2³ = 49191113 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 49191121.

It is not an unprimeable number, because it can be changed into a prime (49191161) 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, 3513645 + ... + 3513658.

It is an arithmetic number, because the mean of its divisors is an integer number (14054608).

Almost surely, 2^49191121 is an apocalyptic number.

It is an amenable number.

49191121 is a deficient number, since it is larger than the sum of its proper divisors (7027311).

49191121 is an equidigital number, since it uses as much as digits as its factorization.

49191121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7027310.

The product of its digits is 648, while the sum is 28.

The square root of 49191121 is about 7013.6382142223. The cubic root of 49191121 is about 366.4057157987.

The spelling of 49191121 in words is "forty-nine million, one hundred ninety-one thousand, one hundred twenty-one".