47638979 has 2 divisors, whose sum is σ = 47638980. Its totient is φ = 47638978.

The previous prime is 47638961. The next prime is 47638991. The reversal of 47638979 is 97983674.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 47638979 - 2²⁰ = 46590403 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 47638979.

It is not a weakly prime, because it can be changed into another prime (47638939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23819489 + 23819490.

It is an arithmetic number, because the mean of its divisors is an integer number (23819490).

Almost surely, 2^47638979 is an apocalyptic number.

47638979 is a deficient number, since it is larger than the sum of its proper divisors (1).

47638979 is an equidigital number, since it uses as much as digits as its factorization.

47638979 is an odious number, because the sum of its binary digits is odd.

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

The square root of 47638979 is about 6902.0996080903. The cubic root of 47638979 is about 362.5106875961.

The spelling of 47638979 in words is "forty-seven million, six hundred thirty-eight thousand, nine hundred seventy-nine".