90814909 has 8 divisors (see below), whose sum is σ = 94800728. Its totient is φ = 86909760.

The previous prime is 90814907. The next prime is 90814937. The reversal of 90814909 is 90941809.

It can be written as a sum of positive squares in 4 ways, for example, as 17455684 + 73359225 = 4178^2 + 8565^2 .

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 90814909 - 2¹ = 90814907 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 (90814907) 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 7 ways as a sum of consecutive naturals, for example, 17862 + ... + 22375.

It is an arithmetic number, because the mean of its divisors is an integer number (11850091).

Almost surely, 2^90814909 is an apocalyptic number.

It is an amenable number.

90814909 is a deficient number, since it is larger than the sum of its proper divisors (3985819).

90814909 is a wasteful number, since it uses less digits than its factorization.

90814909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40335.

The product of its (nonzero) digits is 23328, while the sum is 40.

The square root of 90814909 is about 9529.6856716263. The cubic root of 90814909 is about 449.4889820499.

The spelling of 90814909 in words is "ninety million, eight hundred fourteen thousand, nine hundred nine".