90830881 has 4 divisors (see below), whose sum is σ = 96173892. Its totient is φ = 85487872.

The previous prime is 90830833. The next prime is 90830951. The reversal of 90830881 is 18803809.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 18803809 = 1307 ⋅14387.

It can be written as a sum of positive squares in 2 ways, for example, as 82901025 + 7929856 = 9105^2 + 2816^2 .

It is a cyclic number.

It is not a de Polignac number, because 90830881 - 2¹⁷ = 90699809 is a prime.

It is a super-2 number, since 2×90830881² = 16500497886472322, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 90830881.

It is not an unprimeable number, because it can be changed into a prime (90830081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2671480 + ... + 2671513.

It is an arithmetic number, because the mean of its divisors is an integer number (24043473).

Almost surely, 2^90830881 is an apocalyptic number.

It is an amenable number.

90830881 is a deficient number, since it is larger than the sum of its proper divisors (5343011).

90830881 is a wasteful number, since it uses less digits than its factorization.

90830881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5343010.

The product of its (nonzero) digits is 13824, while the sum is 37.

The square root of 90830881 is about 9530.5236477331. The cubic root of 90830881 is about 449.5153316778.

The spelling of 90830881 in words is "ninety million, eight hundred thirty thousand, eight hundred eighty-one".