198945005 has 16 divisors (see below), whose sum is σ = 273110400. Its totient is φ = 136283712.

The previous prime is 198944969. The next prime is 198945013. The reversal of 198945005 is 500549891.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 198945005 - 2¹² = 198940909 is a prime.

It is a super-3 number, since 3×198945005³ (a number of 26 digits) contains 333 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 43571 + ... + 47919.

It is an arithmetic number, because the mean of its divisors is an integer number (17069400).

Almost surely, 2^198945005 is an apocalyptic number.

It is an amenable number.

198945005 is a deficient number, since it is larger than the sum of its proper divisors (74165395).

198945005 is a wasteful number, since it uses less digits than its factorization.

198945005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5668.

The product of its (nonzero) digits is 64800, while the sum is 41.

The square root of 198945005 is about 14104.7865988820. The cubic root of 198945005 is about 583.7734595863.

The spelling of 198945005 in words is "one hundred ninety-eight million, nine hundred forty-five thousand, five".