632136389 has 4 divisors (see below), whose sum is σ = 633232524. Its totient is φ = 631040256.

The previous prime is 632136361. The next prime is 632136451. The reversal of 632136389 is 983631236.

632136389 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 569061025 + 63075364 = 23855^2 + 7942^2 .

It is a cyclic number.

It is not a de Polignac number, because 632136389 - 2⁸ = 632136133 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (632138389) 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, 547202 + ... + 548355.

It is an arithmetic number, because the mean of its divisors is an integer number (158308131).

Almost surely, 2^632136389 is an apocalyptic number.

It is an amenable number.

632136389 is a deficient number, since it is larger than the sum of its proper divisors (1096135).

632136389 is a wasteful number, since it uses less digits than its factorization.

632136389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1096134.

The product of its digits is 139968, while the sum is 41.

The square root of 632136389 is about 25142.3226651795. The cubic root of 632136389 is about 858.2298133949.

The spelling of 632136389 in words is "six hundred thirty-two million, one hundred thirty-six thousand, three hundred eighty-nine".