478421662931 has 2 divisors, whose sum is σ = 478421662932. Its totient is φ = 478421662930.

The previous prime is 478421662897. The next prime is 478421662933. The reversal of 478421662931 is 139266124874.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 478421662931 - 2³⁰ = 477347921107 is a prime.

It is a super-2 number, since 2×478421662931² (a number of 24 digits) contains 22 as substring.

It is a Sophie Germain prime.

Together with 478421662933, 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 (478421662933) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 239210831465 + 239210831466.

It is an arithmetic number, because the mean of its divisors is an integer number (239210831466).

Almost surely, 2^478421662931 is an apocalyptic number.

478421662931 is a deficient number, since it is larger than the sum of its proper divisors (1).

478421662931 is an equidigital number, since it uses as much as digits as its factorization.

478421662931 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3483648, while the sum is 53.

The spelling of 478421662931 in words is "four hundred seventy-eight billion, four hundred twenty-one million, six hundred sixty-two thousand, nine hundred thirty-one".