49391621 has 4 divisors (see below), whose sum is σ = 51991200. Its totient is φ = 46792044.

The previous prime is 49391599. The next prime is 49391627. The reversal of 49391621 is 12619394.

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 a de Polignac number, because none of the positive numbers 2^k-49391621 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 (49391627) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1299761 + ... + 1299798.

It is an arithmetic number, because the mean of its divisors is an integer number (12997800).

Almost surely, 2^49391621 is an apocalyptic number.

It is an amenable number.

49391621 is a deficient number, since it is larger than the sum of its proper divisors (2599579).

49391621 is a wasteful number, since it uses less digits than its factorization.

49391621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2599578.

The product of its digits is 11664, while the sum is 35.

The square root of 49391621 is about 7027.9172590462. The cubic root of 49391621 is about 366.9028567316.

The spelling of 49391621 in words is "forty-nine million, three hundred ninety-one thousand, six hundred twenty-one".