49979647 has 4 divisors (see below), whose sum is σ = 50150520. Its totient is φ = 49808776.

The previous prime is 49979627. The next prime is 49979651. The reversal of 49979647 is 74697994.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-49979647 is a prime.

It is a super-2 number, since 2×49979647² = 4995930228489218, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (49979627) 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, 84997 + ... + 85582.

It is an arithmetic number, because the mean of its divisors is an integer number (12537630).

Almost surely, 2^49979647 is an apocalyptic number.

49979647 is a deficient number, since it is larger than the sum of its proper divisors (170873).

49979647 is a wasteful number, since it uses less digits than its factorization.

49979647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 170872.

The product of its digits is 3429216, while the sum is 55.

The square root of 49979647 is about 7069.6284909463. The cubic root of 49979647 is about 368.3531556845.

The spelling of 49979647 in words is "forty-nine million, nine hundred seventy-nine thousand, six hundred forty-seven".