90845081 has 8 divisors (see below), whose sum is σ = 94105800. Its totient is φ = 87592960.

The previous prime is 90845047. The next prime is 90845087. The reversal of 90845081 is 18054809.

It can be written as a sum of positive squares in 4 ways, for example, as 14440000 + 76405081 = 3800^2 + 8741^2 .

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 90845081 - 2⁶ = 90845017 is a prime.

It is a super-2 number, since 2×90845081² = 16505657483793122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90845087) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25625 + ... + 28953.

It is an arithmetic number, because the mean of its divisors is an integer number (11763225).

Almost surely, 2^90845081 is an apocalyptic number.

It is an amenable number.

90845081 is a deficient number, since it is larger than the sum of its proper divisors (3260719).

90845081 is a wasteful number, since it uses less digits than its factorization.

90845081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4299.

The product of its (nonzero) digits is 11520, while the sum is 35.

The square root of 90845081 is about 9531.2685934245. The cubic root of 90845081 is about 449.5387553748.

The spelling of 90845081 in words is "ninety million, eight hundred forty-five thousand, eighty-one".