90826709 has 4 divisors (see below), whose sum is σ = 90858540. Its totient is φ = 90794880.

The previous prime is 90826663. The next prime is 90826711. The reversal of 90826709 is 90762809.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 90762809 = 43 ⋅2110763.

It can be written as a sum of positive squares in 2 ways, for example, as 84180625 + 6646084 = 9175^2 + 2578^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-90826709 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90826759) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11162 + ... + 17499.

It is an arithmetic number, because the mean of its divisors is an integer number (22714635).

Almost surely, 2^90826709 is an apocalyptic number.

It is an amenable number.

90826709 is a deficient number, since it is larger than the sum of its proper divisors (31831).

90826709 is a wasteful number, since it uses less digits than its factorization.

90826709 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31830.

The product of its (nonzero) digits is 54432, while the sum is 41.

The square root of 90826709 is about 9530.3047695234. The cubic root of 90826709 is about 449.5084492657.

The spelling of 90826709 in words is "ninety million, eight hundred twenty-six thousand, seven hundred nine".