90531893 has 4 divisors (see below), whose sum is σ = 90572448. Its totient is φ = 90491340.

The previous prime is 90531863. The next prime is 90531907. The reversal of 90531893 is 39813509.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 90531893 - 2⁶ = 90531829 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 (90531853) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16721 + ... + 21462.

It is an arithmetic number, because the mean of its divisors is an integer number (22643112).

Almost surely, 2^90531893 is an apocalyptic number.

It is an amenable number.

90531893 is a deficient number, since it is larger than the sum of its proper divisors (40555).

90531893 is a wasteful number, since it uses less digits than its factorization.

90531893 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40554.

The product of its (nonzero) digits is 29160, while the sum is 38.

The square root of 90531893 is about 9514.8249064289. The cubic root of 90531893 is about 449.0215663174.

The spelling of 90531893 in words is "ninety million, five hundred thirty-one thousand, eight hundred ninety-three".