9090881 has 4 divisors (see below), whose sum is σ = 9284352. Its totient is φ = 8897412.

The previous prime is 9090871. The next prime is 9090901. The reversal of 9090881 is 1880909.

It is a happy number.

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-9090881 is a prime.

It is a super-2 number, since 2×9090881² = 165288234712322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9090811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 96665 + ... + 96758.

It is an arithmetic number, because the mean of its divisors is an integer number (2321088).

Almost surely, 2^9090881 is an apocalyptic number.

It is an amenable number.

9090881 is a deficient number, since it is larger than the sum of its proper divisors (193471).

9090881 is a wasteful number, since it uses less digits than its factorization.

9090881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 193470.

The product of its (nonzero) digits is 5184, while the sum is 35.

The square root of 9090881 is about 3015.1087874238. The cubic root of 9090881 is about 208.7061872745.

The spelling of 9090881 in words is "nine million, ninety thousand, eight hundred eighty-one".