90801593 has 8 divisors (see below), whose sum is σ = 93146760. Its totient is φ = 88462720.

The previous prime is 90801569. The next prime is 90801619. The reversal of 90801593 is 39510809.

It can be written as a sum of positive squares in 4 ways, for example, as 23348224 + 67453369 = 4832^2 + 8213^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-90801593 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (90801553) 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, 44471 + ... + 46467.

It is an arithmetic number, because the mean of its divisors is an integer number (11643345).

Almost surely, 2^90801593 is an apocalyptic number.

It is an amenable number.

90801593 is a deficient number, since it is larger than the sum of its proper divisors (2345167).

90801593 is a wasteful number, since it uses less digits than its factorization.

90801593 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3147.

The product of its (nonzero) digits is 9720, while the sum is 35.

The square root of 90801593 is about 9528.9869870831. The cubic root of 90801593 is about 449.4670117666.

The spelling of 90801593 in words is "ninety million, eight hundred one thousand, five hundred ninety-three".