49189813 has 4 divisors (see below), whose sum is σ = 49667488. Its totient is φ = 48712140.

The previous prime is 49189793. The next prime is 49189897. The reversal of 49189813 is 31898194.

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 49189813 - 2²⁵ = 15635381 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 49189813.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (49139813) 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, 238683 + ... + 238888.

It is an arithmetic number, because the mean of its divisors is an integer number (12416872).

Almost surely, 2^49189813 is an apocalyptic number.

It is an amenable number.

49189813 is a deficient number, since it is larger than the sum of its proper divisors (477675).

49189813 is a wasteful number, since it uses less digits than its factorization.

49189813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 477674.

The product of its digits is 62208, while the sum is 43.

The square root of 49189813 is about 7013.5449667055. The cubic root of 49189813 is about 366.4024681738.

The spelling of 49189813 in words is "forty-nine million, one hundred eighty-nine thousand, eight hundred thirteen".