634476641 has 4 divisors (see below), whose sum is σ = 647976192. Its totient is φ = 620977092.

The previous prime is 634476637. The next prime is 634476649. The reversal of 634476641 is 146674436.

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 634476641 - 2² = 634476637 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (634476649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6749705 + ... + 6749798.

It is an arithmetic number, because the mean of its divisors is an integer number (161994048).

Almost surely, 2^634476641 is an apocalyptic number.

It is an amenable number.

634476641 is a deficient number, since it is larger than the sum of its proper divisors (13499551).

634476641 is a wasteful number, since it uses less digits than its factorization.

634476641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13499550.

The product of its digits is 290304, while the sum is 41.

The square root of 634476641 is about 25188.8197619499. The cubic root of 634476641 is about 859.2876023006.

The spelling of 634476641 in words is "six hundred thirty-four million, four hundred seventy-six thousand, six hundred forty-one".