49981939 has 4 divisors (see below), whose sum is σ = 57122224. Its totient is φ = 42841656.

The previous prime is 49981937. The next prime is 49981961. The reversal of 49981939 is 93918994.

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 49981939 - 2¹ = 49981937 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (49981937) 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, 3570132 + ... + 3570145.

It is an arithmetic number, because the mean of its divisors is an integer number (14280556).

Almost surely, 2^49981939 is an apocalyptic number.

49981939 is a deficient number, since it is larger than the sum of its proper divisors (7140285).

49981939 is an equidigital number, since it uses as much as digits as its factorization.

49981939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7140284.

The product of its digits is 629856, while the sum is 52.

The square root of 49981939 is about 7069.7905909581. The cubic root of 49981939 is about 368.3587863267.

The spelling of 49981939 in words is "forty-nine million, nine hundred eighty-one thousand, nine hundred thirty-nine".