90721353 has 8 divisors (see below), whose sum is σ = 121305888. Its totient is φ = 60308864.

The previous prime is 90721343. The next prime is 90721369. The reversal of 90721353 is 35312709.

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 90721353 - 2²⁰ = 89672777 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 90721353.

It is not an unprimeable number, because it can be changed into a prime (90721303) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41775 + ... + 43892.

It is an arithmetic number, because the mean of its divisors is an integer number (15163236).

Almost surely, 2^90721353 is an apocalyptic number.

It is an amenable number.

90721353 is a deficient number, since it is larger than the sum of its proper divisors (30584535).

90721353 is a wasteful number, since it uses less digits than its factorization.

90721353 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86023.

The product of its (nonzero) digits is 5670, while the sum is 30.

The square root of 90721353 is about 9524.7757453916. The cubic root of 90721353 is about 449.3345770060.

The spelling of 90721353 in words is "ninety million, seven hundred twenty-one thousand, three hundred fifty-three".