478975531 has 2 divisors, whose sum is σ = 478975532. Its totient is φ = 478975530.

The previous prime is 478975457. The next prime is 478975573. The reversal of 478975531 is 135579874.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 478975531 - 2⁹ = 478975019 is a prime.

It is a super-2 number, since 2×478975531² = 458835118593463922, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (478975591) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 239487765 + 239487766.

It is an arithmetic number, because the mean of its divisors is an integer number (239487766).

Almost surely, 2^478975531 is an apocalyptic number.

478975531 is a deficient number, since it is larger than the sum of its proper divisors (1).

478975531 is an equidigital number, since it uses as much as digits as its factorization.

478975531 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1058400, while the sum is 49.

The square root of 478975531 is about 21885.5096125267. The cubic root of 478975531 is about 782.4160952814.

The spelling of 478975531 in words is "four hundred seventy-eight million, nine hundred seventy-five thousand, five hundred thirty-one".