198151459 has 4 divisors (see below), whose sum is σ = 216165240. Its totient is φ = 180137680.

The previous prime is 198151357. The next prime is 198151477. The reversal of 198151459 is 954151891.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 198151459 - 2²³ = 189762851 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (198151159) 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, 9006874 + ... + 9006895.

It is an arithmetic number, because the mean of its divisors is an integer number (54041310).

Almost surely, 2^198151459 is an apocalyptic number.

198151459 is a deficient number, since it is larger than the sum of its proper divisors (18013781).

198151459 is a wasteful number, since it uses less digits than its factorization.

198151459 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18013780.

The product of its digits is 64800, while the sum is 43.

The square root of 198151459 is about 14076.6281118740. The cubic root of 198151459 is about 582.9962458090.

The spelling of 198151459 in words is "one hundred ninety-eight million, one hundred fifty-one thousand, four hundred fifty-nine".