90170201 has 8 divisors (see below), whose sum is σ = 98606208. Its totient is φ = 81774000.

The previous prime is 90170191. The next prime is 90170203. The reversal of 90170201 is 10207109.

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-90170201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90170203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5105 + ... + 14366.

It is an arithmetic number, because the mean of its divisors is an integer number (12325776).

Almost surely, 2^90170201 is an apocalyptic number.

It is an amenable number.

90170201 is a deficient number, since it is larger than the sum of its proper divisors (8436007).

90170201 is a wasteful number, since it uses less digits than its factorization.

90170201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19903.

The product of its (nonzero) digits is 126, while the sum is 20.

The square root of 90170201 is about 9495.7991238231. The cubic root of 90170201 is about 448.4227929011.

The spelling of 90170201 in words is "ninety million, one hundred seventy thousand, two hundred one".