634123198 has 16 divisors (see below), whose sum is σ = 956629440. Its totient is φ = 315252000.

The previous prime is 634123181. The next prime is 634123211. The reversal of 634123198 is 891321436.

It is a super-2 number, since 2×634123198² = 804224460483494408, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 379108 + ... + 380776.

It is an arithmetic number, because the mean of its divisors is an integer number (59789340).

Almost surely, 2^634123198 is an apocalyptic number.

634123198 is a deficient number, since it is larger than the sum of its proper divisors (322506242).

634123198 is a wasteful number, since it uses less digits than its factorization.

634123198 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2643.

The product of its digits is 31104, while the sum is 37.

The square root of 634123198 is about 25181.8029140092. The cubic root of 634123198 is about 859.1280137616.

The spelling of 634123198 in words is "six hundred thirty-four million, one hundred twenty-three thousand, one hundred ninety-eight".