198603891251 has 2 divisors, whose sum is σ = 198603891252. Its totient is φ = 198603891250.

The previous prime is 198603891221. The next prime is 198603891281. The reversal of 198603891251 is 152198306891.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (198603891221) and next prime (198603891281).

It is a cyclic number.

It is not a de Polignac number, because 198603891251 - 2³⁴ = 181424022067 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 198603891193 and 198603891202.

It is not a weakly prime, because it can be changed into another prime (198603891221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99301945625 + 99301945626.

It is an arithmetic number, because the mean of its divisors is an integer number (99301945626).

Almost surely, 2^198603891251 is an apocalyptic number.

198603891251 is a deficient number, since it is larger than the sum of its proper divisors (1).

198603891251 is an equidigital number, since it uses as much as digits as its factorization.

198603891251 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 933120, while the sum is 53.

The spelling of 198603891251 in words is "one hundred ninety-eight billion, six hundred three million, eight hundred ninety-one thousand, two hundred fifty-one".