90897479809 has 8 divisors (see below), whose sum is σ = 97875652320. Its totient is φ = 84100558656.

The previous prime is 90897479713. The next prime is 90897479821.

It is a happy number.

90897479809 is nontrivially palindromic in base 10.

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 90897479809 - 2³¹ = 88749996161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90897479899) 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, 45311799 + ... + 45313804.

It is an arithmetic number, because the mean of its divisors is an integer number (12234456540).

Almost surely, 2^90897479809 is an apocalyptic number.

It is an amenable number.

90897479809 is a deficient number, since it is larger than the sum of its proper divisors (6978172511).

90897479809 is a wasteful number, since it uses less digits than its factorization.

90897479809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90625679.

The product of its (nonzero) digits is 82301184, while the sum is 70.

The spelling of 90897479809 in words is "ninety billion, eight hundred ninety-seven million, four hundred seventy-nine thousand, eight hundred nine".