86783717 has 2 divisors, whose sum is σ = 86783718. Its totient is φ = 86783716.

The previous prime is 86783707. The next prime is 86783731. The reversal of 86783717 is 71738768.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 77986561 + 8797156 = 8831^2 + 2966^2 .

It is a cyclic number.

It is not a de Polignac number, because 86783717 - 2²⁴ = 70006501 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (86783707) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43391858 + 43391859.

It is an arithmetic number, because the mean of its divisors is an integer number (43391859).

Almost surely, 2^86783717 is an apocalyptic number.

It is an amenable number.

86783717 is a deficient number, since it is larger than the sum of its proper divisors (1).

86783717 is an equidigital number, since it uses as much as digits as its factorization.

86783717 is an evil number, because the sum of its binary digits is even.

The product of its digits is 395136, while the sum is 47.

The square root of 86783717 is about 9315.7778526541. Note that the first 3 decimals coincide. The cubic root of 86783717 is about 442.7372696267.

The spelling of 86783717 in words is "eighty-six million, seven hundred eighty-three thousand, seven hundred seventeen".