90166109 has 4 divisors (see below), whose sum is σ = 98363040. Its totient is φ = 81969180.

The previous prime is 90166099. The next prime is 90166123.

It is a happy number.

90166109 is nontrivially palindromic in base 10.

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 a de Polignac number, because none of the positive numbers 2^k-90166109 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 (90166159) 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, 4098449 + ... + 4098470.

It is an arithmetic number, because the mean of its divisors is an integer number (24590760).

Almost surely, 2^90166109 is an apocalyptic number.

It is an amenable number.

90166109 is a deficient number, since it is larger than the sum of its proper divisors (8196931).

90166109 is a wasteful number, since it uses less digits than its factorization.

90166109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8196930.

The product of its (nonzero) digits is 2916, while the sum is 32.

The square root of 90166109 is about 9495.5836576800. The cubic root of 90166109 is about 448.4160095299.

The spelling of 90166109 in words is "ninety million, one hundred sixty-six thousand, one hundred nine".