198756974371 has 2 divisors, whose sum is σ = 198756974372. Its totient is φ = 198756974370.

The previous prime is 198756974369. The next prime is 198756974399. The reversal of 198756974371 is 173479657891.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 198756974371 - 2¹ = 198756974369 is a prime.

It is a super-2 number, since 2×198756974371² (a number of 23 digits) contains 22 as substring.

Together with 198756974369, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 198756974297 and 198756974306.

It is not a weakly prime, because it can be changed into another prime (198756174371) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99378487185 + 99378487186.

It is an arithmetic number, because the mean of its divisors is an integer number (99378487186).

Almost surely, 2^198756974371 is an apocalyptic number.

198756974371 is a deficient number, since it is larger than the sum of its proper divisors (1).

198756974371 is an equidigital number, since it uses as much as digits as its factorization.

198756974371 is an evil number, because the sum of its binary digits is even.

The product of its digits is 80015040, while the sum is 67.

The spelling of 198756974371 in words is "one hundred ninety-eight billion, seven hundred fifty-six million, nine hundred seventy-four thousand, three hundred seventy-one".