634646413 has 4 divisors (see below), whose sum is σ = 634779900. Its totient is φ = 634512928.

The previous prime is 634646401. The next prime is 634646423. The reversal of 634646413 is 314646436.

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 84603204 + 550043209 = 9198^2 + 23453^2 .

It is a cyclic number.

It is not a de Polignac number, because 634646413 - 2¹⁷ = 634515341 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 (634646423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 59338 + ... + 69211.

It is an arithmetic number, because the mean of its divisors is an integer number (158694975).

Almost surely, 2^634646413 is an apocalyptic number.

It is an amenable number.

634646413 is a deficient number, since it is larger than the sum of its proper divisors (133487).

634646413 is a wasteful number, since it uses less digits than its factorization.

634646413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133486.

The product of its digits is 124416, while the sum is 37.

The square root of 634646413 is about 25192.1895237393. The cubic root of 634646413 is about 859.3642376226.

The spelling of 634646413 in words is "six hundred thirty-four million, six hundred forty-six thousand, four hundred thirteen".