90109811 has 8 divisors (see below), whose sum is σ = 100588224. Its totient is φ = 80012520.

The previous prime is 90109739. The next prime is 90109819. The reversal of 90109811 is 11890109.

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 90109811 - 2¹⁰ = 90108787 is a prime.

It is not an unprimeable number, because it can be changed into a prime (90109819) 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, 94781 + ... + 95726.

It is an arithmetic number, because the mean of its divisors is an integer number (12573528).

Almost surely, 2^90109811 is an apocalyptic number.

90109811 is a deficient number, since it is larger than the sum of its proper divisors (10478413).

90109811 is a wasteful number, since it uses less digits than its factorization.

90109811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 190561.

The product of its (nonzero) digits is 648, while the sum is 29.

The square root of 90109811 is about 9492.6187640714. The cubic root of 90109811 is about 448.3226626292.

It can be divided in two parts, 901098 and 11, that added together give a palindrome (901109).

The spelling of 90109811 in words is "ninety million, one hundred nine thousand, eight hundred eleven".