634378893 has 8 divisors (see below), whose sum is σ = 882614208. Its totient is φ = 404531424.

The previous prime is 634378891. The next prime is 634378907. The reversal of 634378893 is 398873436.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 634378893 - 2¹ = 634378891 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (634378891) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4596880 + ... + 4597017.

It is an arithmetic number, because the mean of its divisors is an integer number (110326776).

Almost surely, 2^634378893 is an apocalyptic number.

It is an amenable number.

634378893 is a deficient number, since it is larger than the sum of its proper divisors (248235315).

634378893 is a wasteful number, since it uses less digits than its factorization.

634378893 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9193923.

The product of its digits is 2612736, while the sum is 51.

The square root of 634378893 is about 25186.8793819322. The cubic root of 634378893 is about 859.2434725129.

The spelling of 634378893 in words is "six hundred thirty-four million, three hundred seventy-eight thousand, eight hundred ninety-three".