198961015 has 8 divisors (see below), whose sum is σ = 260458128. Its totient is φ = 144698880.

The previous prime is 198961003. The next prime is 198961019. The reversal of 198961015 is 510169891.

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

It is a de Polignac number, because none of the positive numbers 2^k-198961015 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198961019) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1808682 + ... + 1808791.

It is an arithmetic number, because the mean of its divisors is an integer number (32557266).

Almost surely, 2^198961015 is an apocalyptic number.

198961015 is a deficient number, since it is larger than the sum of its proper divisors (61497113).

198961015 is a wasteful number, since it uses less digits than its factorization.

198961015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3617489.

The product of its (nonzero) digits is 19440, while the sum is 40.

The square root of 198961015 is about 14105.3541252958. The cubic root of 198961015 is about 583.7891187922.

The spelling of 198961015 in words is "one hundred ninety-eight million, nine hundred sixty-one thousand, fifteen".