634310909 has 4 divisors (see below), whose sum is σ = 643778304. Its totient is φ = 624843516.

The previous prime is 634310893. The next prime is 634310969. The reversal of 634310909 is 909013436.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 634310909 - 2⁴ = 634310893 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 (634310969) 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, 4733597 + ... + 4733730.

It is an arithmetic number, because the mean of its divisors is an integer number (160944576).

Almost surely, 2^634310909 is an apocalyptic number.

It is an amenable number.

634310909 is a deficient number, since it is larger than the sum of its proper divisors (9467395).

634310909 is an equidigital number, since it uses as much as digits as its factorization.

634310909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9467394.

The product of its (nonzero) digits is 17496, while the sum is 35.

The square root of 634310909 is about 25185.5297542061. The cubic root of 634310909 is about 859.2127774527.

The spelling of 634310909 in words is "six hundred thirty-four million, three hundred ten thousand, nine hundred nine".