90840717 has 16 divisors (see below), whose sum is σ = 146813760. Its totient is φ = 55054800.

The previous prime is 90840703. The next prime is 90840719. The reversal of 90840717 is 71704809.

It is not a de Polignac number, because 90840717 - 2¹¹ = 90838669 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90840719) 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, 152634 + ... + 153227.

It is an arithmetic number, because the mean of its divisors is an integer number (9175860).

Almost surely, 2^90840717 is an apocalyptic number.

It is an amenable number.

90840717 is a deficient number, since it is larger than the sum of its proper divisors (55973043).

90840717 is a wasteful number, since it uses less digits than its factorization.

90840717 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 305881 (or 305875 counting only the distinct ones).

The product of its (nonzero) digits is 14112, while the sum is 36.

The square root of 90840717 is about 9531.0396599741. The cubic root of 90840717 is about 449.5315569717.

The spelling of 90840717 in words is "ninety million, eight hundred forty thousand, seven hundred seventeen".