198015634 has 4 divisors (see below), whose sum is σ = 297023454. Its totient is φ = 99007816.

The previous prime is 198015617. The next prime is 198015659. The reversal of 198015634 is 436510891.

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

It can be written as a sum of positive squares in only one way, i.e., 166487409 + 31528225 = 12903^2 + 5615^2 .

It is a junction number, because it is equal to n+sod(n) for n = 198015593 and 198015602.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49503907 + ... + 49503910.

Almost surely, 2^198015634 is an apocalyptic number.

198015634 is a deficient number, since it is larger than the sum of its proper divisors (99007820).

198015634 is an equidigital number, since it uses as much as digits as its factorization.

198015634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99007819.

The product of its (nonzero) digits is 25920, while the sum is 37.

The square root of 198015634 is about 14071.8027985045. The cubic root of 198015634 is about 582.8630083935.

The spelling of 198015634 in words is "one hundred ninety-eight million, fifteen thousand, six hundred thirty-four".