632311643 has 4 divisors (see below), whose sum is σ = 633821160. Its totient is φ = 630802128.

The previous prime is 632311613. The next prime is 632311649. The reversal of 632311643 is 346113236.

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

It is a cyclic number.

It is not a de Polignac number, because 632311643 - 2⁶ = 632311579 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (632311649) 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, 754130 + ... + 754967.

It is an arithmetic number, because the mean of its divisors is an integer number (158455290).

Almost surely, 2^632311643 is an apocalyptic number.

632311643 is a deficient number, since it is larger than the sum of its proper divisors (1509517).

632311643 is a wasteful number, since it uses less digits than its factorization.

632311643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1509516.

The product of its digits is 7776, while the sum is 29.

The square root of 632311643 is about 25145.8076625111. The cubic root of 632311643 is about 858.3091181740.

Adding to 632311643 its reverse (346113236), we get a palindrome (978424879).

The spelling of 632311643 in words is "six hundred thirty-two million, three hundred eleven thousand, six hundred forty-three".