634956389 has 8 divisors (see below), whose sum is σ = 640355328. Its totient is φ = 629579440.

The previous prime is 634956373. The next prime is 634956401. The reversal of 634956389 is 983659436.

634956389 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 634956389 - 2⁴ = 634956373 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 634956389.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (634956089) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55304 + ... + 65790.

It is an arithmetic number, because the mean of its divisors is an integer number (80044416).

Almost surely, 2^634956389 is an apocalyptic number.

It is an amenable number.

634956389 is a deficient number, since it is larger than the sum of its proper divisors (5398939).

634956389 is a wasteful number, since it uses less digits than its factorization.

634956389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10995.

The product of its digits is 4199040, while the sum is 53.

The square root of 634956389 is about 25198.3409969784. The cubic root of 634956389 is about 859.5041259794.

The spelling of 634956389 in words is "six hundred thirty-four million, nine hundred fifty-six thousand, three hundred eighty-nine".