198953297 has 4 divisors (see below), whose sum is σ = 198984816. Its totient is φ = 198921780.

The previous prime is 198953281. The next prime is 198953317. The reversal of 198953297 is 792359891.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 198953297 - 2⁴ = 198953281 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (198953267) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2663 + ... + 20124.

It is an arithmetic number, because the mean of its divisors is an integer number (49746204).

Almost surely, 2^198953297 is an apocalyptic number.

It is an amenable number.

198953297 is a deficient number, since it is larger than the sum of its proper divisors (31519).

198953297 is an equidigital number, since it uses as much as digits as its factorization.

198953297 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31518.

The product of its digits is 1224720, while the sum is 53.

The square root of 198953297 is about 14105.0805385861. The cubic root of 198953297 is about 583.7815700057.

The spelling of 198953297 in words is "one hundred ninety-eight million, nine hundred fifty-three thousand, two hundred ninety-seven".