634023109 has 4 divisors (see below), whose sum is σ = 671318604. Its totient is φ = 596727616.

The previous prime is 634023073. The next prime is 634023127. The reversal of 634023109 is 901320436.

634023109 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.

It can be written as a sum of positive squares in 2 ways, for example, as 478646884 + 155376225 = 21878^2 + 12465^2 .

It is a cyclic number.

It is not a de Polignac number, because 634023109 - 2²⁵ = 600468677 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 (634023149) 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, 18647722 + ... + 18647755.

It is an arithmetic number, because the mean of its divisors is an integer number (167829651).

Almost surely, 2^634023109 is an apocalyptic number.

It is an amenable number.

634023109 is a deficient number, since it is larger than the sum of its proper divisors (37295495).

634023109 is a wasteful number, since it uses less digits than its factorization.

634023109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37295494.

The product of its (nonzero) digits is 3888, while the sum is 28.

The square root of 634023109 is about 25179.8155076641. The cubic root of 634023109 is about 859.0828102488.

The spelling of 634023109 in words is "six hundred thirty-four million, twenty-three thousand, one hundred nine".