49904391 has 4 divisors (see below), whose sum is σ = 66539192. Its totient is φ = 33269592.

The previous prime is 49904377. The next prime is 49904419. The reversal of 49904391 is 19340994.

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

It is not a de Polignac number, because 49904391 - 2⁷ = 49904263 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 (49904311) 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, 8317396 + ... + 8317401.

It is an arithmetic number, because the mean of its divisors is an integer number (16634798).

Almost surely, 2^49904391 is an apocalyptic number.

49904391 is a deficient number, since it is larger than the sum of its proper divisors (16634801).

49904391 is a wasteful number, since it uses less digits than its factorization.

49904391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16634800.

The product of its (nonzero) digits is 34992, while the sum is 39.

The square root of 49904391 is about 7064.3039996874. The cubic root of 49904391 is about 368.1681823219.

The spelling of 49904391 in words is "forty-nine million, nine hundred four thousand, three hundred ninety-one".