198189682 has 4 divisors (see below), whose sum is σ = 297284526. Its totient is φ = 99094840.

The previous prime is 198189661. The next prime is 198189701. The reversal of 198189682 is 286981891.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 286981891 = 7 ⋅40997413.

It can be written as a sum of positive squares in only one way, i.e., 184932801 + 13256881 = 13599^2 + 3641^2 .

It is a super-2 number, since 2×198189682² = 78558300102522248, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49547419 + ... + 49547422.

Almost surely, 2^198189682 is an apocalyptic number.

198189682 is a deficient number, since it is larger than the sum of its proper divisors (99094844).

198189682 is an equidigital number, since it uses as much as digits as its factorization.

198189682 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99094843.

The product of its digits is 497664, while the sum is 52.

The square root of 198189682 is about 14077.9857223965. The cubic root of 198189682 is about 583.0337296491.

The spelling of 198189682 in words is "one hundred ninety-eight million, one hundred eighty-nine thousand, six hundred eighty-two".