632368921 has 4 divisors (see below), whose sum is σ = 632721844. Its totient is φ = 632016000.

The previous prime is 632368909. The next prime is 632368937. The reversal of 632368921 is 129863236.

632368921 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in 2 ways, for example, as 114169225 + 518199696 = 10685^2 + 22764^2 .

It is a cyclic number.

It is not a de Polignac number, because 632368921 - 2¹⁷ = 632237849 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (632368021) 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, 173760 + ... + 177361.

It is an arithmetic number, because the mean of its divisors is an integer number (158180461).

Almost surely, 2^632368921 is an apocalyptic number.

It is an amenable number.

632368921 is a deficient number, since it is larger than the sum of its proper divisors (352923).

632368921 is a wasteful number, since it uses less digits than its factorization.

632368921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 352922.

The product of its digits is 93312, while the sum is 40.

The square root of 632368921 is about 25146.9465542042. The cubic root of 632368921 is about 858.3350340579.

The spelling of 632368921 in words is "six hundred thirty-two million, three hundred sixty-eight thousand, nine hundred twenty-one".