86667257 has 2 divisors, whose sum is σ = 86667258. Its totient is φ = 86667256.

The previous prime is 86667233. The next prime is 86667307. The reversal of 86667257 is 75276668.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 85082176 + 1585081 = 9224^2 + 1259^2 .

It is a cyclic number.

It is not a de Polignac number, because 86667257 - 2⁸ = 86667001 is a prime.

It is a super-2 number, since 2×86667257² = 15022426871808098, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (86667557) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43333628 + 43333629.

It is an arithmetic number, because the mean of its divisors is an integer number (43333629).

Almost surely, 2^86667257 is an apocalyptic number.

It is an amenable number.

86667257 is a deficient number, since it is larger than the sum of its proper divisors (1).

86667257 is an equidigital number, since it uses as much as digits as its factorization.

86667257 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 846720, while the sum is 47.

The square root of 86667257 is about 9309.5250684447. The cubic root of 86667257 is about 442.5391362068.

The spelling of 86667257 in words is "eighty-six million, six hundred sixty-seven thousand, two hundred fifty-seven".