427641631 has 2 divisors, whose sum is σ = 427641632. Its totient is φ = 427641630.

The previous prime is 427641619. The next prime is 427641649. The reversal of 427641631 is 136146724.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 427641631 - 2⁹ = 427641119 is a prime.

It is a super-2 number, since 2×427641631² = 365754729128680322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (427641661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 213820815 + 213820816.

It is an arithmetic number, because the mean of its divisors is an integer number (213820816).

Almost surely, 2^427641631 is an apocalyptic number.

427641631 is a deficient number, since it is larger than the sum of its proper divisors (1).

427641631 is an equidigital number, since it uses as much as digits as its factorization.

427641631 is an evil number, because the sum of its binary digits is even.

The product of its digits is 24192, while the sum is 34.

The square root of 427641631 is about 20679.4978420657. The cubic root of 427641631 is about 753.4018097403.

The spelling of 427641631 in words is "four hundred twenty-seven million, six hundred forty-one thousand, six hundred thirty-one".