650198194 has 4 divisors (see below), whose sum is σ = 975297294. Its totient is φ = 325099096.

The previous prime is 650198177. The next prime is 650198209. The reversal of 650198194 is 491891056.

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., 348307569 + 301890625 = 18663^2 + 17375^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 650198194.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 162549547 + ... + 162549550.

Almost surely, 2^650198194 is an apocalyptic number.

650198194 is a deficient number, since it is larger than the sum of its proper divisors (325099100).

650198194 is a wasteful number, since it uses less digits than its factorization.

650198194 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 325099099.

The product of its (nonzero) digits is 77760, while the sum is 43.

The square root of 650198194 is about 25498.9841758451. The cubic root of 650198194 is about 866.3271391597.

The spelling of 650198194 in words is "six hundred fifty million, one hundred ninety-eight thousand, one hundred ninety-four".