634349799 has 24 divisors (see below), whose sum is σ = 982996560. Its totient is φ = 408312576.

The previous prime is 634349783. The next prime is 634349801. The reversal of 634349799 is 997943436.

634349799 is a `hidden beast` number, since 63 + 4 + 3 + 497 + 99 = 666.

It is not a de Polignac number, because 634349799 - 2⁴ = 634349783 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (634347799) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 37962 + ... + 52055.

It is an arithmetic number, because the mean of its divisors is an integer number (40958190).

Almost surely, 2^634349799 is an apocalyptic number.

634349799 is a deficient number, since it is larger than the sum of its proper divisors (348646761).

634349799 is an equidigital number, since it uses as much as digits as its factorization.

634349799 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90061 (or 90049 counting only the distinct ones).

The product of its digits is 4408992, while the sum is 54.

The square root of 634349799 is about 25186.3018126918. The cubic root of 634349799 is about 859.2303367187.

The spelling of 634349799 in words is "six hundred thirty-four million, three hundred forty-nine thousand, seven hundred ninety-nine".