634149999 has 16 divisors (see below), whose sum is σ = 1073693440. Its totient is φ = 362371320.

The previous prime is 634149979. The next prime is 634150003. The reversal of 634149999 is 999941436.

634149999 is a `hidden beast` number, since 63 + 4 + 1 + 499 + 99 = 666.

It is not a de Polignac number, because 634149999 - 2²¹ = 632052847 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 (634149949) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1677457 + ... + 1677834.

It is an arithmetic number, because the mean of its divisors is an integer number (67105840).

Almost surely, 2^634149999 is an apocalyptic number.

634149999 is a deficient number, since it is larger than the sum of its proper divisors (439543441).

634149999 is a wasteful number, since it uses less digits than its factorization.

634149999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3355307 (or 3355301 counting only the distinct ones).

The product of its digits is 1889568, while the sum is 54.

The square root of 634149999 is about 25182.3350585286. The cubic root of 634149999 is about 859.1401171749.

The spelling of 634149999 in words is "six hundred thirty-four million, one hundred forty-nine thousand, nine hundred ninety-nine".