198136884487 has 2 divisors, whose sum is σ = 198136884488. Its totient is φ = 198136884486.

The previous prime is 198136884389. The next prime is 198136884551. The reversal of 198136884487 is 784488631891.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 198136884487 - 2⁷ = 198136884359 is a prime.

It is a super-3 number, since 3×198136884487³ (a number of 35 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (198116884487) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99068442243 + 99068442244.

It is an arithmetic number, because the mean of its divisors is an integer number (99068442244).

Almost surely, 2^198136884487 is an apocalyptic number.

198136884487 is a deficient number, since it is larger than the sum of its proper divisors (1).

198136884487 is an equidigital number, since it uses as much as digits as its factorization.

198136884487 is an evil number, because the sum of its binary digits is even.

The product of its digits is 74317824, while the sum is 67.

The spelling of 198136884487 in words is "one hundred ninety-eight billion, one hundred thirty-six million, eight hundred eighty-four thousand, four hundred eighty-seven".