47665979 has 2 divisors, whose sum is σ = 47665980. Its totient is φ = 47665978.

The previous prime is 47665967. The next prime is 47665991. The reversal of 47665979 is 97956674.

It is a balanced prime because it is at equal distance from previous prime (47665967) and next prime (47665991).

It is a cyclic number.

It is not a de Polignac number, because 47665979 - 2⁴ = 47665963 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 47665979.

It is not a weakly prime, because it can be changed into another prime (47665279) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23832989 + 23832990.

It is an arithmetic number, because the mean of its divisors is an integer number (23832990).

Almost surely, 2^47665979 is an apocalyptic number.

47665979 is a deficient number, since it is larger than the sum of its proper divisors (1).

47665979 is an equidigital number, since it uses as much as digits as its factorization.

47665979 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2857680, while the sum is 53.

The square root of 47665979 is about 6904.0552576004. The cubic root of 47665979 is about 362.5791605164.

The spelling of 47665979 in words is "forty-seven million, six hundred sixty-five thousand, nine hundred seventy-nine".