478481831 has 2 divisors, whose sum is σ = 478481832. Its totient is φ = 478481830.

The previous prime is 478481821. The next prime is 478481833. The reversal of 478481831 is 138184874.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-478481831 is a prime.

It is a super-2 number, since 2×478481831² = 457889725194225122, which contains 22 as substring.

Together with 478481833, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (478481833) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 239240915 + 239240916.

It is an arithmetic number, because the mean of its divisors is an integer number (239240916).

Almost surely, 2^478481831 is an apocalyptic number.

478481831 is a deficient number, since it is larger than the sum of its proper divisors (1).

478481831 is an equidigital number, since it uses as much as digits as its factorization.

478481831 is an evil number, because the sum of its binary digits is even.

The product of its digits is 172032, while the sum is 44.

The square root of 478481831 is about 21874.2275520760. The cubic root of 478481831 is about 782.1471799297.

The spelling of 478481831 in words is "four hundred seventy-eight million, four hundred eighty-one thousand, eight hundred thirty-one".