90293865 has 16 divisors (see below), whose sum is σ = 145281600. Its totient is φ = 47886272.

The previous prime is 90293857. The next prime is 90293867. The reversal of 90293865 is 56839209.

90293865 is nontrivially palindromic in base 14.

It is a cyclic number.

It is not a de Polignac number, because 90293865 - 2³ = 90293857 is a prime.

It is not an unprimeable number, because it can be changed into a prime (90293867) 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 15 ways as a sum of consecutive naturals, for example, 14130 + ... + 19499.

It is an arithmetic number, because the mean of its divisors is an integer number (9080100).

Almost surely, 2^90293865 is an apocalyptic number.

It is an amenable number.

90293865 is a deficient number, since it is larger than the sum of its proper divisors (54987735).

90293865 is a wasteful number, since it uses less digits than its factorization.

90293865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33816.

The product of its (nonzero) digits is 116640, while the sum is 42.

The square root of 90293865 is about 9502.3084037512. The cubic root of 90293865 is about 448.6276958670.

Subtracting from 90293865 its reverse (56839209), we obtain a square (33454656 = 5784²).

The spelling of 90293865 in words is "ninety million, two hundred ninety-three thousand, eight hundred sixty-five".