634320998 has 4 divisors (see below), whose sum is σ = 951481500. Its totient is φ = 317160498.

The previous prime is 634320991. The next prime is 634321001. The reversal of 634320998 is 899023436.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (634320991) 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 as a sum of consecutive naturals, namely, 158580248 + ... + 158580251.

It is an arithmetic number, because the mean of its divisors is an integer number (237870375).

Almost surely, 2^634320998 is an apocalyptic number.

634320998 is a deficient number, since it is larger than the sum of its proper divisors (317160502).

634320998 is a wasteful number, since it uses less digits than its factorization.

634320998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 317160501.

The product of its (nonzero) digits is 279936, while the sum is 44.

The square root of 634320998 is about 25185.7300469929. The cubic root of 634320998 is about 859.2173328169.

The spelling of 634320998 in words is "six hundred thirty-four million, three hundred twenty thousand, nine hundred ninety-eight".