47639879 has 8 divisors (see below), whose sum is σ = 54681120. Its totient is φ = 40657536.

The previous prime is 47639863. The next prime is 47639929. The reversal of 47639879 is 97893674.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 47639879 - 2⁴ = 47639863 is a prime.

It is a super-2 number, since 2×47639879² = 4539116142269282, which contains 22 as substring.

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 47639879.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47639819) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12974 + ... + 16235.

It is an arithmetic number, because the mean of its divisors is an integer number (6835140).

Almost surely, 2^47639879 is an apocalyptic number.

47639879 is a deficient number, since it is larger than the sum of its proper divisors (7041241).

47639879 is a wasteful number, since it uses less digits than its factorization.

47639879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29449.

The product of its digits is 2286144, while the sum is 53.

The square root of 47639879 is about 6902.1648053346. The cubic root of 47639879 is about 362.5129704436.

The spelling of 47639879 in words is "forty-seven million, six hundred thirty-nine thousand, eight hundred seventy-nine".