198039451 has 8 divisors (see below), whose sum is σ = 208755200. Its totient is φ = 187353000.

The previous prime is 198039433. The next prime is 198039469. The reversal of 198039451 is 154930891.

It is an interprime number because it is at equal distance from previous prime (198039433) and next prime (198039469).

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

It is a cyclic number.

It is not a de Polignac number, because 198039451 - 2⁵ = 198039419 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (198039431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7330 + ... + 21208.

It is an arithmetic number, because the mean of its divisors is an integer number (26094400).

Almost surely, 2^198039451 is an apocalyptic number.

198039451 is a deficient number, since it is larger than the sum of its proper divisors (10715749).

198039451 is a wasteful number, since it uses less digits than its factorization.

198039451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14649.

The product of its (nonzero) digits is 38880, while the sum is 40.

The square root of 198039451 is about 14072.6490398930. The cubic root of 198039451 is about 582.8863760631.

The spelling of 198039451 in words is "one hundred ninety-eight million, thirty-nine thousand, four hundred fifty-one".