198765001 has 8 divisors (see below), whose sum is σ = 200581920. Its totient is φ = 196956288.

The previous prime is 198764989. The next prime is 198765013. The reversal of 198765001 is 100567891.

It is an interprime number because it is at equal distance from previous prime (198764989) and next prime (198765013).

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 198765001 - 2²⁵ = 165210569 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (198765401) 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, 53145 + ... + 56761.

It is an arithmetic number, because the mean of its divisors is an integer number (25072740).

Almost surely, 2^198765001 is an apocalyptic number.

It is an amenable number.

198765001 is a deficient number, since it is larger than the sum of its proper divisors (1816919).

198765001 is a wasteful number, since it uses less digits than its factorization.

198765001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4103.

The product of its (nonzero) digits is 15120, while the sum is 37.

The square root of 198765001 is about 14098.4042004760. The cubic root of 198765001 is about 583.5973417925.

The spelling of 198765001 in words is "one hundred ninety-eight million, seven hundred sixty-five thousand, one".