420927631 has 2 divisors, whose sum is σ = 420927632. Its totient is φ = 420927630.

The previous prime is 420927613. The next prime is 420927649. The reversal of 420927631 is 136729024.

Together with previous prime (420927613) it forms an Ormiston pair, because they use the same digits, order apart.

It is a balanced prime because it is at equal distance from previous prime (420927613) and next prime (420927649).

It is a cyclic number.

It is not a de Polignac number, because 420927631 - 2⁹ = 420927119 is a prime.

It is a super-2 number, since 2×420927631² = 354360141078544322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (420927601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210463815 + 210463816.

It is an arithmetic number, because the mean of its divisors is an integer number (210463816).

Almost surely, 2^420927631 is an apocalyptic number.

420927631 is a deficient number, since it is larger than the sum of its proper divisors (1).

420927631 is an equidigital number, since it uses as much as digits as its factorization.

420927631 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18144, while the sum is 34.

The square root of 420927631 is about 20516.5209282666. The cubic root of 420927631 is about 749.4381753907.

The spelling of 420927631 in words is "four hundred twenty million, nine hundred twenty-seven thousand, six hundred thirty-one".