634304789 has 4 divisors (see below), whose sum is σ = 634459980. Its totient is φ = 634149600.

The previous prime is 634304773. The next prime is 634304819. The reversal of 634304789 is 987403436.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 138886225 + 495418564 = 11785^2 + 22258^2 .

It is a cyclic number.

It is not a de Polignac number, because 634304789 - 2⁴ = 634304773 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (634304089) 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, 71294 + ... + 79695.

It is an arithmetic number, because the mean of its divisors is an integer number (158614995).

Almost surely, 2^634304789 is an apocalyptic number.

It is an amenable number.

634304789 is a deficient number, since it is larger than the sum of its proper divisors (155191).

634304789 is a wasteful number, since it uses less digits than its factorization.

634304789 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155190.

The product of its (nonzero) digits is 435456, while the sum is 44.

The square root of 634304789 is about 25185.4082555753. The cubic root of 634304789 is about 859.2100141395.

The spelling of 634304789 in words is "six hundred thirty-four million, three hundred four thousand, seven hundred eighty-nine".