86667517 has 2 divisors, whose sum is σ = 86667518. Its totient is φ = 86667516.

The previous prime is 86667491. The next prime is 86667527. The reversal of 86667517 is 71576668.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 78251716 + 8415801 = 8846^2 + 2901^2 .

It is a cyclic number.

It is not a de Polignac number, because 86667517 - 2¹⁵ = 86634749 is a prime.

It is a super-2 number, since 2×86667517² = 15022517005890578, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (86667527) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43333758 + 43333759.

It is an arithmetic number, because the mean of its divisors is an integer number (43333759).

Almost surely, 2^86667517 is an apocalyptic number.

It is an amenable number.

86667517 is a deficient number, since it is larger than the sum of its proper divisors (1).

86667517 is an equidigital number, since it uses as much as digits as its factorization.

86667517 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 423360, while the sum is 46.

The square root of 86667517 is about 9309.5390326267. The cubic root of 86667517 is about 442.5395787425.

The spelling of 86667517 in words is "eighty-six million, six hundred sixty-seven thousand, five hundred seventeen".