909090169 has 8 divisors (see below), whose sum is σ = 1030547840. Its totient is φ = 794993616.

The previous prime is 909090109. The next prime is 909090179. The reversal of 909090169 is 961090909.

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 909090169 - 2⁷ = 909090041 is a prime.

It is a super-2 number, since 2×909090169² = 1652889870744897122, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is not an unprimeable number, because it can be changed into a prime (909090109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1840017 + ... + 1840510.

It is an arithmetic number, because the mean of its divisors is an integer number (128818480).

Almost surely, 2^909090169 is an apocalyptic number.

It is an amenable number.

909090169 is a deficient number, since it is larger than the sum of its proper divisors (121457671).

909090169 is a wasteful number, since it uses less digits than its factorization.

909090169 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3680559.

The product of its (nonzero) digits is 39366, while the sum is 43.

The square root of 909090169 is about 30151.1221847546. The cubic root of 909090169 is about 968.7290432706.

The spelling of 909090169 in words is "nine hundred nine million, ninety thousand, one hundred sixty-nine".