478308031 has 2 divisors, whose sum is σ = 478308032. Its totient is φ = 478308030.

The previous prime is 478307993. The next prime is 478308037. The reversal of 478308031 is 130803874.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 478308031 - 2¹³ = 478299839 is a prime.

It is a super-2 number, since 2×478308031² = 457557145038193922, which contains 22 as substring.

It is equal to p_25271674 and since 478308031 and 25271674 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (478308037) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 239154015 + 239154016.

It is an arithmetic number, because the mean of its divisors is an integer number (239154016).

Almost surely, 2^478308031 is an apocalyptic number.

478308031 is a deficient number, since it is larger than the sum of its proper divisors (1).

478308031 is an equidigital number, since it uses as much as digits as its factorization.

478308031 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16128, while the sum is 34.

The square root of 478308031 is about 21870.2544795437. The cubic root of 478308031 is about 782.0524681187.

The spelling of 478308031 in words is "four hundred seventy-eight million, three hundred eight thousand, thirty-one".