90284999 has 6 divisors (see below), whose sum is σ = 105025464. Its totient is φ = 77387100.

The previous prime is 90284983. The next prime is 90285029. The reversal of 90284999 is 99948209.

It is not a de Polignac number, because 90284999 - 2⁴ = 90284983 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 (90284939) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 921227 + ... + 921324.

It is an arithmetic number, because the mean of its divisors is an integer number (17504244).

Almost surely, 2^90284999 is an apocalyptic number.

90284999 is a deficient number, since it is larger than the sum of its proper divisors (14740465).

90284999 is a wasteful number, since it uses less digits than its factorization.

90284999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1842565 (or 1842558 counting only the distinct ones).

The product of its (nonzero) digits is 419904, while the sum is 50.

The square root of 90284999 is about 9501.8418740789. The cubic root of 90284999 is about 448.6130117267.

The spelling of 90284999 in words is "ninety million, two hundred eighty-four thousand, nine hundred ninety-nine".