63406831 has 2 divisors, whose sum is σ = 63406832. Its totient is φ = 63406830.

The previous prime is 63406813. The next prime is 63406841. The reversal of 63406831 is 13860436.

Together with previous prime (63406813) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 63406831 - 2¹³ = 63398639 is a prime.

It is a super-2 number, since 2×63406831² = 8040852434925122, which contains 22 as substring.

It is equal to p_3751960 and since 63406831 and 3751960 have the same sum of digits, it is a Honaker prime.

It is a junction number, because it is equal to n+sod(n) for n = 63406793 and 63406802.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (63406841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31703415 + 31703416.

It is an arithmetic number, because the mean of its divisors is an integer number (31703416).

Almost surely, 2^63406831 is an apocalyptic number.

63406831 is a deficient number, since it is larger than the sum of its proper divisors (1).

63406831 is an equidigital number, since it uses as much as digits as its factorization.

63406831 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10368, while the sum is 31.

The square root of 63406831 is about 7962.8406363558. The cubic root of 63406831 is about 398.7603936586.

The spelling of 63406831 in words is "sixty-three million, four hundred six thousand, eight hundred thirty-one".