90359809 has 8 divisors (see below), whose sum is σ = 93030080. Its totient is φ = 87701616.

The previous prime is 90359791. The next prime is 90359827. The reversal of 90359809 is 90895309.

It is an interprime number because it is at equal distance from previous prime (90359791) and next prime (90359827).

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 90359809 - 2¹⁹ = 89835521 is a prime.

It is a super-3 number, since 3×90359809³ (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90354809) 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, 13462 + ... + 19024.

It is an arithmetic number, because the mean of its divisors is an integer number (11628760).

Almost surely, 2^90359809 is an apocalyptic number.

It is an amenable number.

90359809 is a deficient number, since it is larger than the sum of its proper divisors (2670271).

90359809 is a wasteful number, since it uses less digits than its factorization.

90359809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6039.

The product of its (nonzero) digits is 87480, while the sum is 43.

The square root of 90359809 is about 9505.7776641367. Note that the first 3 decimals coincide. The cubic root of 90359809 is about 448.7368841846.

The spelling of 90359809 in words is "ninety million, three hundred fifty-nine thousand, eight hundred nine".