90106717 has 2 divisors, whose sum is σ = 90106718. Its totient is φ = 90106716.

The previous prime is 90106697. The next prime is 90106787. The reversal of 90106717 is 71760109.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 85488516 + 4618201 = 9246^2 + 2149^2 .

It is an emirp because it is prime and its reverse (71760109) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-90106717 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90106787) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45053358 + 45053359.

It is an arithmetic number, because the mean of its divisors is an integer number (45053359).

Almost surely, 2^90106717 is an apocalyptic number.

It is an amenable number.

90106717 is a deficient number, since it is larger than the sum of its proper divisors (1).

90106717 is an equidigital number, since it uses as much as digits as its factorization.

90106717 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2646, while the sum is 31.

The square root of 90106717 is about 9492.4557939450. The cubic root of 90106717 is about 448.3175313855.

The spelling of 90106717 in words is "ninety million, one hundred six thousand, seven hundred seventeen".