634607399 has 4 divisors (see below), whose sum is σ = 671937264. Its totient is φ = 597277536.

The previous prime is 634607383. The next prime is 634607431. The reversal of 634607399 is 993706436.

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

It is a cyclic number.

It is not a de Polignac number, because 634607399 - 2⁴ = 634607383 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 (631607399) 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 3 ways as a sum of consecutive naturals, for example, 18664907 + ... + 18664940.

It is an arithmetic number, because the mean of its divisors is an integer number (167984316).

Almost surely, 2^634607399 is an apocalyptic number.

634607399 is a deficient number, since it is larger than the sum of its proper divisors (37329865).

634607399 is a wasteful number, since it uses less digits than its factorization.

634607399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37329864.

The product of its (nonzero) digits is 734832, while the sum is 47.

The square root of 634607399 is about 25191.4151845425. The cubic root of 634607399 is about 859.3466278571.

The spelling of 634607399 in words is "six hundred thirty-four million, six hundred seven thousand, three hundred ninety-nine".