49902439 has 4 divisors (see below), whose sum is σ = 50201424. Its totient is φ = 49603456.

The previous prime is 49902427. The next prime is 49902443. The reversal of 49902439 is 93420994.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 93420994 = 2 ⋅46710497.

It is a cyclic number.

It is not a de Polignac number, because 49902439 - 2⁵ = 49902407 is a prime.

It is a Duffinian number.

49902439 is a modest number, since divided by 2439 gives 499 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (49902469) 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, 149242 + ... + 149575.

It is an arithmetic number, because the mean of its divisors is an integer number (12550356).

Almost surely, 2^49902439 is an apocalyptic number.

49902439 is a deficient number, since it is larger than the sum of its proper divisors (298985).

49902439 is a wasteful number, since it uses less digits than its factorization.

49902439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 298984.

The product of its (nonzero) digits is 69984, while the sum is 40.

The square root of 49902439 is about 7064.1658389367. The cubic root of 49902439 is about 368.1633819850.

The spelling of 49902439 in words is "forty-nine million, nine hundred two thousand, four hundred thirty-nine".