632988109 has 8 divisors (see below), whose sum is σ = 688430232. Its totient is φ = 578510400.

The previous prime is 632988107. The next prime is 632988121. The reversal of 632988109 is 901889236.

It can be written as a sum of positive squares in 4 ways, for example, as 143472484 + 489515625 = 11978^2 + 22125^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 632988109 - 2¹ = 632988107 is a prime.

It is a super-4 number, since 4×632988109⁴ (a number of 36 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (632988107) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 239734 + ... + 242359.

It is an arithmetic number, because the mean of its divisors is an integer number (86053779).

Almost surely, 2^632988109 is an apocalyptic number.

It is an amenable number.

632988109 is a deficient number, since it is larger than the sum of its proper divisors (55442123).

632988109 is a wasteful number, since it uses less digits than its factorization.

632988109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 482207.

The product of its (nonzero) digits is 186624, while the sum is 46.

The square root of 632988109 is about 25159.2549372989. The cubic root of 632988109 is about 858.6150907175.

The spelling of 632988109 in words is "six hundred thirty-two million, nine hundred eighty-eight thousand, one hundred nine".