634326387 has 8 divisors (see below), whose sum is σ = 851370240. Its totient is φ = 420083400.

The previous prime is 634326379. The next prime is 634326397. The reversal of 634326387 is 783623436.

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

It is not a de Polignac number, because 634326387 - 2³ = 634326379 is a prime.

It is not an unprimeable number, because it can be changed into a prime (634326307) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 699687 + ... + 700592.

It is an arithmetic number, because the mean of its divisors is an integer number (106421280).

Almost surely, 2^634326387 is an apocalyptic number.

634326387 is a deficient number, since it is larger than the sum of its proper divisors (217043853).

634326387 is a wasteful number, since it uses less digits than its factorization.

634326387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1400433.

The product of its digits is 435456, while the sum is 42.

The square root of 634326387 is about 25185.8370319511. The cubic root of 634326387 is about 859.2197660272.

The spelling of 634326387 in words is "six hundred thirty-four million, three hundred twenty-six thousand, three hundred eighty-seven".