631903747 has 4 divisors (see below), whose sum is σ = 642614040. Its totient is φ = 621193456.

The previous prime is 631903703. The next prime is 631903751. The reversal of 631903747 is 747309136.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-631903747 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (631903147) 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, 5355058 + ... + 5355175.

It is an arithmetic number, because the mean of its divisors is an integer number (160653510).

Almost surely, 2^631903747 is an apocalyptic number.

631903747 is a deficient number, since it is larger than the sum of its proper divisors (10710293).

631903747 is a wasteful number, since it uses less digits than its factorization.

631903747 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10710292.

The product of its (nonzero) digits is 95256, while the sum is 40.

The square root of 631903747 is about 25137.6957376765. The cubic root of 631903747 is about 858.1245171318.

The spelling of 631903747 in words is "six hundred thirty-one million, nine hundred three thousand, seven hundred forty-seven".