632325781 has 4 divisors (see below), whose sum is σ = 640987852. Its totient is φ = 623663712.

The previous prime is 632325779. The next prime is 632325791. The reversal of 632325781 is 187523236.

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 353101681 + 279224100 = 18791^2 + 16710^2 .

It is a cyclic number.

It is not a de Polignac number, because 632325781 - 2¹ = 632325779 is a prime.

It is a super-2 number, since 2×632325781² = 799671786634519922, which contains 22 as substring.

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 632325781.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (632325721) 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, 4330926 + ... + 4331071.

It is an arithmetic number, because the mean of its divisors is an integer number (160246963).

Almost surely, 2^632325781 is an apocalyptic number.

It is an amenable number.

632325781 is a deficient number, since it is larger than the sum of its proper divisors (8662071).

632325781 is an equidigital number, since it uses as much as digits as its factorization.

632325781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8662070.

The product of its digits is 60480, while the sum is 37.

The square root of 632325781 is about 25146.0887813592. The cubic root of 632325781 is about 858.3155151693.

The spelling of 632325781 in words is "six hundred thirty-two million, three hundred twenty-five thousand, seven hundred eighty-one".