198309453 has 8 divisors (see below), whose sum is σ = 273530400. Its totient is φ = 127647408.

The previous prime is 198309409. The next prime is 198309457. The reversal of 198309453 is 354903891.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 198309453 - 2⁶ = 198309389 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198309457) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1139623 + ... + 1139796.

It is an arithmetic number, because the mean of its divisors is an integer number (34191300).

Almost surely, 2^198309453 is an apocalyptic number.

It is an amenable number.

198309453 is a deficient number, since it is larger than the sum of its proper divisors (75220947).

198309453 is a wasteful number, since it uses less digits than its factorization.

198309453 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2279451.

The product of its (nonzero) digits is 116640, while the sum is 42.

The square root of 198309453 is about 14082.2389200013. The cubic root of 198309453 is about 583.1511533045.

The spelling of 198309453 in words is "one hundred ninety-eight million, three hundred nine thousand, four hundred fifty-three".