198415853 has 2 divisors, whose sum is σ = 198415854. Its totient is φ = 198415852.

The previous prime is 198415843. The next prime is 198415897. The reversal of 198415853 is 358514891.

It is an a-pointer prime, because the next prime (198415897) can be obtained adding 198415853 to its sum of digits (44).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 111049444 + 87366409 = 10538^2 + 9347^2 .

It is a cyclic number.

It is not a de Polignac number, because 198415853 - 2⁸ = 198415597 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (198415843) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99207926 + 99207927.

It is an arithmetic number, because the mean of its divisors is an integer number (99207927).

Almost surely, 2^198415853 is an apocalyptic number.

It is an amenable number.

198415853 is a deficient number, since it is larger than the sum of its proper divisors (1).

198415853 is an equidigital number, since it uses as much as digits as its factorization.

198415853 is an evil number, because the sum of its binary digits is even.

The product of its digits is 172800, while the sum is 44.

The square root of 198415853 is about 14086.0162217712. The cubic root of 198415853 is about 583.2554283626.

The spelling of 198415853 in words is "one hundred ninety-eight million, four hundred fifteen thousand, eight hundred fifty-three".