198725413 has 2 divisors, whose sum is σ = 198725414. Its totient is φ = 198725412.

The previous prime is 198725411. The next prime is 198725437. The reversal of 198725413 is 314527891.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 198725409 + 4 = 14097^2 + 2^2 .

It is a cyclic number.

It is not a de Polignac number, because 198725413 - 2¹ = 198725411 is a prime.

Together with 198725411, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (198725411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99362706 + 99362707.

It is an arithmetic number, because the mean of its divisors is an integer number (99362707).

Almost surely, 2^198725413 is an apocalyptic number.

It is an amenable number.

198725413 is a deficient number, since it is larger than the sum of its proper divisors (1).

198725413 is an equidigital number, since it uses as much as digits as its factorization.

198725413 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 60480, while the sum is 40.

The square root of 198725413 is about 14097.0001418742. Note that the first 3 decimals coincide. The cubic root of 198725413 is about 583.5585942171.

The spelling of 198725413 in words is "one hundred ninety-eight million, seven hundred twenty-five thousand, four hundred thirteen".