634490447 has 4 divisors (see below), whose sum is σ = 634651200. Its totient is φ = 634329696.

The previous prime is 634490411. The next prime is 634490471. The reversal of 634490447 is 744094436.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 634490447 - 2¹⁰ = 634489423 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 (634490407) 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, 74303 + ... + 82400.

It is an arithmetic number, because the mean of its divisors is an integer number (158662800).

Almost surely, 2^634490447 is an apocalyptic number.

634490447 is a deficient number, since it is larger than the sum of its proper divisors (160753).

634490447 is a wasteful number, since it uses less digits than its factorization.

634490447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160752.

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

The square root of 634490447 is about 25189.0938106157. The cubic root of 634490447 is about 859.2938348592.

The spelling of 634490447 in words is "six hundred thirty-four million, four hundred ninety thousand, four hundred forty-seven".