890166197 has 4 divisors (see below), whose sum is σ = 890838336. Its totient is φ = 889494060.

The previous prime is 890166149. The next prime is 890166247. The reversal of 890166197 is 791661098.

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 890166197 - 2²⁴ = 873388981 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 (890165197) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 334079 + ... + 336732.

It is an arithmetic number, because the mean of its divisors is an integer number (222709584).

Almost surely, 2^890166197 is an apocalyptic number.

It is an amenable number.

890166197 is a deficient number, since it is larger than the sum of its proper divisors (672139).

890166197 is a wasteful number, since it uses less digits than its factorization.

890166197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 672138.

The product of its (nonzero) digits is 163296, while the sum is 47.

The square root of 890166197 is about 29835.6531183750. The cubic root of 890166197 is about 961.9600423841.

The spelling of 890166197 in words is "eight hundred ninety million, one hundred sixty-six thousand, one hundred ninety-seven".