680433631 has 2 divisors, whose sum is σ = 680433632. Its totient is φ = 680433630.

The previous prime is 680433629. The next prime is 680433647. The reversal of 680433631 is 136334086.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 680433631 - 2¹ = 680433629 is a prime.

It is a super-2 number, since 2×680433631² = 925979852391688322, which contains 22 as substring.

Together with 680433629, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (680433661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 340216815 + 340216816.

It is an arithmetic number, because the mean of its divisors is an integer number (340216816).

Almost surely, 2^680433631 is an apocalyptic number.

680433631 is a deficient number, since it is larger than the sum of its proper divisors (1).

680433631 is an equidigital number, since it uses as much as digits as its factorization.

680433631 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 31104, while the sum is 34.

The square root of 680433631 is about 26085.1227905870. The cubic root of 680433631 is about 879.5528164430.

The spelling of 680433631 in words is "six hundred eighty million, four hundred thirty-three thousand, six hundred thirty-one".