90865863 has 12 divisors (see below), whose sum is σ = 143182728. Its totient is φ = 55070160.

The previous prime is 90865849. The next prime is 90865883. The reversal of 90865863 is 36856809.

It is not a de Polignac number, because 90865863 - 2¹² = 90861767 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90865843) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 458820 + ... + 459017.

It is an arithmetic number, because the mean of its divisors is an integer number (11931894).

Almost surely, 2^90865863 is an apocalyptic number.

90865863 is a deficient number, since it is larger than the sum of its proper divisors (52316865).

90865863 is a wasteful number, since it uses less digits than its factorization.

90865863 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 917854 (or 917851 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 45.

The square root of 90865863 is about 9532.3587322341. The cubic root of 90865863 is about 449.5730320504.

The spelling of 90865863 in words is "ninety million, eight hundred sixty-five thousand, eight hundred sixty-three".