90540893 has 8 divisors (see below), whose sum is σ = 91383000. Its totient is φ = 89702208.

The previous prime is 90540883. The next prime is 90540913. The reversal of 90540893 is 39804509.

It can be written as a sum of positive squares in 4 ways, for example, as 23251684 + 67289209 = 4822^2 + 8203^2 .

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 90540893 - 2²⁰ = 89492317 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90540823) 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, 108803 + ... + 109631.

It is an arithmetic number, because the mean of its divisors is an integer number (11422875).

Almost surely, 2^90540893 is an apocalyptic number.

It is an amenable number.

90540893 is a deficient number, since it is larger than the sum of its proper divisors (842107).

90540893 is a wasteful number, since it uses less digits than its factorization.

90540893 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1711.

The product of its (nonzero) digits is 38880, while the sum is 38.

The square root of 90540893 is about 9515.2978408456. The cubic root of 90540893 is about 449.0364452736.

The spelling of 90540893 in words is "ninety million, five hundred forty thousand, eight hundred ninety-three".