49170391 has 4 divisors (see below), whose sum is σ = 49844032. Its totient is φ = 48496752.

The previous prime is 49170383. The next prime is 49170397. The reversal of 49170391 is 19307194.

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

It is a cyclic number.

It is not a de Polignac number, because 49170391 - 2³ = 49170383 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 (49170397) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 336711 + ... + 336856.

It is an arithmetic number, because the mean of its divisors is an integer number (12461008).

Almost surely, 2^49170391 is an apocalyptic number.

49170391 is a deficient number, since it is larger than the sum of its proper divisors (673641).

49170391 is an equidigital number, since it uses as much as digits as its factorization.

49170391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 673640.

The product of its (nonzero) digits is 6804, while the sum is 34.

The square root of 49170391 is about 7012.1602234975. The cubic root of 49170391 is about 366.3542386381.

The spelling of 49170391 in words is "forty-nine million, one hundred seventy thousand, three hundred ninety-one".