90871593 has 16 divisors (see below), whose sum is σ = 125151936. Its totient is φ = 58605120.

The previous prime is 90871591. The next prime is 90871601. The reversal of 90871593 is 39517809.

It is a happy number.

It is not a de Polignac number, because 90871593 - 2¹ = 90871591 is a prime.

It is not an unprimeable number, because it can be changed into a prime (90871591) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17830 + ... + 22352.

It is an arithmetic number, because the mean of its divisors is an integer number (7821996).

Almost surely, 2^90871593 is an apocalyptic number.

It is an amenable number.

90871593 is a deficient number, since it is larger than the sum of its proper divisors (34280343).

90871593 is a wasteful number, since it uses less digits than its factorization.

90871593 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4744.

The product of its (nonzero) digits is 68040, while the sum is 42.

The square root of 90871593 is about 9532.6592826976. The cubic root of 90871593 is about 449.5824818748.

The spelling of 90871593 in words is "ninety million, eight hundred seventy-one thousand, five hundred ninety-three".