49639679 has 4 divisors (see below), whose sum is σ = 49858584. Its totient is φ = 49420776.

The previous prime is 49639669. The next prime is 49639687. The reversal of 49639679 is 97693694.

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 49639679 - 2⁴ = 49639663 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 49639679.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (49639669) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 109112 + ... + 109565.

It is an arithmetic number, because the mean of its divisors is an integer number (12464646).

Almost surely, 2^49639679 is an apocalyptic number.

49639679 is a deficient number, since it is larger than the sum of its proper divisors (218905).

49639679 is a wasteful number, since it uses less digits than its factorization.

49639679 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 218904.

The product of its digits is 2204496, while the sum is 53.

The square root of 49639679 is about 7045.5432012017. The cubic root of 49639679 is about 367.5160595817.

The spelling of 49639679 in words is "forty-nine million, six hundred thirty-nine thousand, six hundred seventy-nine".