90782717 has 2 divisors, whose sum is σ = 90782718. Its totient is φ = 90782716.

The previous prime is 90782711. The next prime is 90782723. The reversal of 90782717 is 71728709.

It is a balanced prime because it is at equal distance from previous prime (90782711) and next prime (90782723).

It can be written as a sum of positive squares in only one way, i.e., 85858756 + 4923961 = 9266^2 + 2219^2 .

It is a cyclic number.

It is not a de Polignac number, because 90782717 - 2¹² = 90778621 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90782711) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45391358 + 45391359.

It is an arithmetic number, because the mean of its divisors is an integer number (45391359).

Almost surely, 2^90782717 is an apocalyptic number.

It is an amenable number.

90782717 is a deficient number, since it is larger than the sum of its proper divisors (1).

90782717 is an equidigital number, since it uses as much as digits as its factorization.

90782717 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 49392, while the sum is 41.

The square root of 90782717 is about 9527.9964840464. The cubic root of 90782717 is about 449.4358642687.

The spelling of 90782717 in words is "ninety million, seven hundred eighty-two thousand, seven hundred seventeen".