478619831 has 2 divisors, whose sum is σ = 478619832. Its totient is φ = 478619830.

The previous prime is 478619821. The next prime is 478619873. The reversal of 478619831 is 138916874.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 478619831 - 2⁶ = 478619767 is a prime.

It is a super-2 number, since 2×478619831² = 458153885252937122, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (478619821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 239309915 + 239309916.

It is an arithmetic number, because the mean of its divisors is an integer number (239309916).

Almost surely, 2^478619831 is an apocalyptic number.

478619831 is a deficient number, since it is larger than the sum of its proper divisors (1).

478619831 is an equidigital number, since it uses as much as digits as its factorization.

478619831 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 290304, while the sum is 47.

The square root of 478619831 is about 21877.3817217692. The cubic root of 478619831 is about 782.2223662995. Note that the first 3 decimals are identical.

The spelling of 478619831 in words is "four hundred seventy-eight million, six hundred nineteen thousand, eight hundred thirty-one".