189817001 has 4 divisors (see below), whose sum is σ = 207073104. Its totient is φ = 172560900.

The previous prime is 189816997. The next prime is 189817027. The reversal of 189817001 is 100718981.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 189817001 - 2² = 189816997 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (189817031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8628035 + ... + 8628056.

It is an arithmetic number, because the mean of its divisors is an integer number (51768276).

Almost surely, 2^189817001 is an apocalyptic number.

189817001 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

189817001 is a deficient number, since it is larger than the sum of its proper divisors (17256103).

189817001 is a wasteful number, since it uses less digits than its factorization.

189817001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17256102.

The product of its (nonzero) digits is 4032, while the sum is 35.

The square root of 189817001 is about 13777.4090815363. The cubic root of 189817001 is about 574.7050797618.

The spelling of 189817001 in words is "one hundred eighty-nine million, eight hundred seventeen thousand, one".