49899521 has 4 divisors (see below), whose sum is σ = 57028032. Its totient is φ = 42771012.

The previous prime is 49899463. The next prime is 49899533. The reversal of 49899521 is 12599894.

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 49899521 - 2⁶ = 49899457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (49890521) 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, 3564245 + ... + 3564258.

It is an arithmetic number, because the mean of its divisors is an integer number (14257008).

Almost surely, 2^49899521 is an apocalyptic number.

It is an amenable number.

49899521 is a deficient number, since it is larger than the sum of its proper divisors (7128511).

49899521 is an equidigital number, since it uses as much as digits as its factorization.

49899521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7128510.

The product of its digits is 233280, while the sum is 47.

The square root of 49899521 is about 7063.9593005623. The cubic root of 49899521 is about 368.1562058382.

The spelling of 49899521 in words is "forty-nine million, eight hundred ninety-nine thousand, five hundred twenty-one".