63742631 has 4 divisors (see below), whose sum is σ = 63834264. Its totient is φ = 63651000.

The previous prime is 63742619. The next prime is 63742643. The reversal of 63742631 is 13624736.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (63742619) and next prime (63742643).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-63742631 is a prime.

It is a super-2 number, since 2×63742631² = 8126246013604322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63742681) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44765 + ... + 46166.

It is an arithmetic number, because the mean of its divisors is an integer number (15958566).

Almost surely, 2^63742631 is an apocalyptic number.

63742631 is a deficient number, since it is larger than the sum of its proper divisors (91633).

63742631 is an equidigital number, since it uses as much as digits as its factorization.

63742631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91632.

The product of its digits is 18144, while the sum is 32.

The square root of 63742631 is about 7983.8982333194. The cubic root of 63742631 is about 399.4630942363.

The spelling of 63742631 in words is "sixty-three million, seven hundred forty-two thousand, six hundred thirty-one".