427801631 has 2 divisors, whose sum is σ = 427801632. Its totient is φ = 427801630.

The previous prime is 427801613. The next prime is 427801657. The reversal of 427801631 is 136108724.

Together with previous prime (427801613) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 427801631 - 2²⁶ = 360692767 is a prime.

It is a super-2 number, since 2×427801631² = 366028470972520322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (427801691) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 213900815 + 213900816.

It is an arithmetic number, because the mean of its divisors is an integer number (213900816).

Almost surely, 2^427801631 is an apocalyptic number.

427801631 is a deficient number, since it is larger than the sum of its proper divisors (1).

427801631 is an equidigital number, since it uses as much as digits as its factorization.

427801631 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8064, while the sum is 32.

The square root of 427801631 is about 20683.3660461734. The cubic root of 427801631 is about 753.4957585441.

The spelling of 427801631 in words is "four hundred twenty-seven million, eight hundred one thousand, six hundred thirty-one".