634342899 has 4 divisors (see below), whose sum is σ = 845790536. Its totient is φ = 422895264.

The previous prime is 634342889. The next prime is 634342927. The reversal of 634342899 is 998243436.

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

It is not a de Polignac number, because 634342899 - 2¹³ = 634334707 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (634342889) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 105723814 + ... + 105723819.

It is an arithmetic number, because the mean of its divisors is an integer number (211447634).

Almost surely, 2^634342899 is an apocalyptic number.

634342899 is a deficient number, since it is larger than the sum of its proper divisors (211447637).

634342899 is a wasteful number, since it uses less digits than its factorization.

634342899 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 211447636.

The product of its digits is 1119744, while the sum is 48.

The square root of 634342899 is about 25186.1648330983. The cubic root of 634342899 is about 859.2272213446.

The spelling of 634342899 in words is "six hundred thirty-four million, three hundred forty-two thousand, eight hundred ninety-nine".