49478939 has 4 divisors (see below), whose sum is σ = 50629656. Its totient is φ = 48328224.

The previous prime is 49478929. The next prime is 49478941. The reversal of 49478939 is 93987494.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 93987494 = 2 ⋅46993747.

It is a cyclic number.

It is not a de Polignac number, because 49478939 - 2²⁰ = 48430363 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (49478929) 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, 575294 + ... + 575379.

It is an arithmetic number, because the mean of its divisors is an integer number (12657414).

Almost surely, 2^49478939 is an apocalyptic number.

49478939 is a deficient number, since it is larger than the sum of its proper divisors (1150717).

49478939 is a wasteful number, since it uses less digits than its factorization.

49478939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1150716.

The product of its digits is 1959552, while the sum is 53.

The square root of 49478939 is about 7034.1267403993. The cubic root of 49478939 is about 367.1189417159.

The spelling of 49478939 in words is "forty-nine million, four hundred seventy-eight thousand, nine hundred thirty-nine".