634400359 has 4 divisors (see below), whose sum is σ = 634451704. Its totient is φ = 634349016.

The previous prime is 634400357. The next prime is 634400387. The reversal of 634400359 is 953004436.

It is a happy number.

634400359 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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 634400359 - 2¹ = 634400357 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 (634400357) 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, 5389 + ... + 36025.

It is an arithmetic number, because the mean of its divisors is an integer number (158612926).

Almost surely, 2^634400359 is an apocalyptic number.

634400359 is a deficient number, since it is larger than the sum of its proper divisors (51345).

634400359 is a wasteful number, since it uses less digits than its factorization.

634400359 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51344.

The product of its (nonzero) digits is 38880, while the sum is 34.

The square root of 634400359 is about 25187.3055128968. The cubic root of 634400359 is about 859.2531640461.

The spelling of 634400359 in words is "six hundred thirty-four million, four hundred thousand, three hundred fifty-nine".