49789191 has 4 divisors (see below), whose sum is σ = 66385592. Its totient is φ = 33192792.

The previous prime is 49789171. The next prime is 49789199. The reversal of 49789191 is 19198794.

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

It is not a de Polignac number, because 49789191 - 2¹³ = 49780999 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 49789191.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (49789199) 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, 8298196 + ... + 8298201.

It is an arithmetic number, because the mean of its divisors is an integer number (16596398).

Almost surely, 2^49789191 is an apocalyptic number.

49789191 is a deficient number, since it is larger than the sum of its proper divisors (16596401).

49789191 is a wasteful number, since it uses less digits than its factorization.

49789191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16596400.

The product of its digits is 163296, while the sum is 48.

The square root of 49789191 is about 7056.1456192457. The cubic root of 49789191 is about 367.8846691798.

The spelling of 49789191 in words is "forty-nine million, seven hundred eighty-nine thousand, one hundred ninety-one".