90623805 has 16 divisors (see below), whose sum is σ = 146629440. Its totient is φ = 47788928.

The previous prime is 90623803. The next prime is 90623807. The reversal of 90623805 is 50832609.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (90623803) and next prime (90623807).

It is a cyclic number.

It is not a de Polignac number, because 90623805 - 2¹ = 90623803 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90623803) 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 15 ways as a sum of consecutive naturals, for example, 32607 + ... + 35276.

It is an arithmetic number, because the mean of its divisors is an integer number (9164340).

Almost surely, 2^90623805 is an apocalyptic number.

It is an amenable number.

90623805 is a deficient number, since it is larger than the sum of its proper divisors (56005635).

90623805 is a wasteful number, since it uses less digits than its factorization.

90623805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67980.

The product of its (nonzero) digits is 12960, while the sum is 33.

The square root of 90623805 is about 9519.6536176481. The cubic root of 90623805 is about 449.1734704703.

The spelling of 90623805 in words is "ninety million, six hundred twenty-three thousand, eight hundred five".