47178979 has 2 divisors, whose sum is σ = 47178980. Its totient is φ = 47178978.

The previous prime is 47178977. The next prime is 47178991. The reversal of 47178979 is 97987174.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 47178979 - 2¹ = 47178977 is a prime.

Together with 47178977, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (47178973) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23589489 + 23589490.

It is an arithmetic number, because the mean of its divisors is an integer number (23589490).

Almost surely, 2^47178979 is an apocalyptic number.

47178979 is a deficient number, since it is larger than the sum of its proper divisors (1).

47178979 is an equidigital number, since it uses as much as digits as its factorization.

47178979 is an evil number, because the sum of its binary digits is even.

The product of its digits is 889056, while the sum is 52.

The square root of 47178979 is about 6868.6955821320. The cubic root of 47178979 is about 361.3401157669.

The spelling of 47178979 in words is "forty-seven million, one hundred seventy-eight thousand, nine hundred seventy-nine".