198051965 has 8 divisors (see below), whose sum is σ = 247995648. Its totient is φ = 151552720.

The previous prime is 198051947. The next prime is 198051977. The reversal of 198051965 is 569150891.

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

It is not a de Polignac number, because 198051965 - 2¹² = 198047869 is a prime.

It is a super-2 number, since 2×198051965² = 78449161680722450, which contains 22 as substring.

It is a Duffinian number.

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 7 ways as a sum of consecutive naturals, for example, 860981 + ... + 861210.

It is an arithmetic number, because the mean of its divisors is an integer number (30999456).

Almost surely, 2^198051965 is an apocalyptic number.

It is an amenable number.

198051965 is a deficient number, since it is larger than the sum of its proper divisors (49943683).

198051965 is a wasteful number, since it uses less digits than its factorization.

198051965 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1722219.

The product of its (nonzero) digits is 97200, while the sum is 44.

The square root of 198051965 is about 14073.0936542041. The cubic root of 198051965 is about 582.8986532238.

The spelling of 198051965 in words is "one hundred ninety-eight million, fifty-one thousand, nine hundred sixty-five".