63423631 has 2 divisors, whose sum is σ = 63423632. Its totient is φ = 63423630.

The previous prime is 63423629. The next prime is 63423637. The reversal of 63423631 is 13632436.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 63423631 - 2¹ = 63423629 is a prime.

It is a super-2 number, since 2×63423631² = 8045113938448322, which contains 22 as substring.

Together with 63423629, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 63423631.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (63423637) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31711815 + 31711816.

It is an arithmetic number, because the mean of its divisors is an integer number (31711816).

Almost surely, 2^63423631 is an apocalyptic number.

63423631 is a deficient number, since it is larger than the sum of its proper divisors (1).

63423631 is an equidigital number, since it uses as much as digits as its factorization.

63423631 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7776, while the sum is 28.

The square root of 63423631 is about 7963.8954664159. The cubic root of 63423631 is about 398.7956084924.

The spelling of 63423631 in words is "sixty-three million, four hundred twenty-three thousand, six hundred thirty-one".