632136961 has 4 divisors (see below), whose sum is σ = 642499924. Its totient is φ = 621774000.

The previous prime is 632136941. The next prime is 632136997. The reversal of 632136961 is 169631236.

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 147476736 + 484660225 = 12144^2 + 22015^2 .

It is a cyclic number.

It is not a de Polignac number, because 632136961 - 2⁵ = 632136929 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 632136961.

It is not an unprimeable number, because it can be changed into a prime (632136941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5181390 + ... + 5181511.

It is an arithmetic number, because the mean of its divisors is an integer number (160624981).

Almost surely, 2^632136961 is an apocalyptic number.

632136961 is a gapful number since it is divisible by the number (61) formed by its first and last digit.

It is an amenable number.

632136961 is a deficient number, since it is larger than the sum of its proper divisors (10362963).

632136961 is a wasteful number, since it uses less digits than its factorization.

632136961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10362962.

The product of its digits is 34992, while the sum is 37.

The square root of 632136961 is about 25142.3340404188. The cubic root of 632136961 is about 858.2300722564.

The spelling of 632136961 in words is "six hundred thirty-two million, one hundred thirty-six thousand, nine hundred sixty-one".