478879187 has 2 divisors, whose sum is σ = 478879188. Its totient is φ = 478879186.

The previous prime is 478879147. The next prime is 478879189. The reversal of 478879187 is 781978874.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 478879187 - 2⁸ = 478878931 is a prime.

Together with 478879189, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (478879189) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 239439593 + 239439594.

It is an arithmetic number, because the mean of its divisors is an integer number (239439594).

Almost surely, 2^478879187 is an apocalyptic number.

478879187 is a deficient number, since it is larger than the sum of its proper divisors (1).

478879187 is an equidigital number, since it uses as much as digits as its factorization.

478879187 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6322176, while the sum is 59.

The square root of 478879187 is about 21883.3084107500. The cubic root of 478879187 is about 782.3636318143.

The spelling of 478879187 in words is "four hundred seventy-eight million, eight hundred seventy-nine thousand, one hundred eighty-seven".