90836331809 has 4 divisors (see below), whose sum is σ = 92550224916. Its totient is φ = 89122438704.

The previous prime is 90836331797. The next prime is 90836331823. The reversal of 90836331809 is 90813363809.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 50715040000 + 40121291809 = 225200^2 + 200303^2 .

It is a cyclic number.

It is not a de Polignac number, because 90836331809 - 2⁴ = 90836331793 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90836331709) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 856946474 + ... + 856946579.

It is an arithmetic number, because the mean of its divisors is an integer number (23137556229).

Almost surely, 2^90836331809 is an apocalyptic number.

It is an amenable number.

90836331809 is a deficient number, since it is larger than the sum of its proper divisors (1713893107).

90836331809 is a wasteful number, since it uses less digits than its factorization.

90836331809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1713893106.

The product of its (nonzero) digits is 839808, while the sum is 50.

The spelling of 90836331809 in words is "ninety billion, eight hundred thirty-six million, three hundred thirty-one thousand, eight hundred nine".