90164191 has 8 divisors (see below), whose sum is σ = 97337520. Its totient is φ = 83024832.

The previous prime is 90164149. The next prime is 90164197. The reversal of 90164191 is 19146109.

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 90164191 - 2⁹ = 90163679 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 (90164197) 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, 2830 + ... + 13723.

It is an arithmetic number, because the mean of its divisors is an integer number (12167190).

Almost surely, 2^90164191 is an apocalyptic number.

90164191 is a deficient number, since it is larger than the sum of its proper divisors (7173329).

90164191 is a wasteful number, since it uses less digits than its factorization.

90164191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16985.

The product of its (nonzero) digits is 1944, while the sum is 31.

The square root of 90164191 is about 9495.4826628245. The cubic root of 90164191 is about 448.4128299613.

The spelling of 90164191 in words is "ninety million, one hundred sixty-four thousand, one hundred ninety-one".