86786669 has 2 divisors, whose sum is σ = 86786670. Its totient is φ = 86786668.

The previous prime is 86786653. The next prime is 86786671. The reversal of 86786669 is 96668768.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 60264169 + 26522500 = 7763^2 + 5150^2 .

It is a cyclic number.

It is not a de Polignac number, because 86786669 - 2⁴ = 86786653 is a prime.

It is a super-2 number, since 2×86786669² = 15063851832231122, which contains 22 as substring.

Together with 86786671, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (86786969) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43393334 + 43393335.

It is an arithmetic number, because the mean of its divisors is an integer number (43393335).

Almost surely, 2^86786669 is an apocalyptic number.

It is an amenable number.

86786669 is a deficient number, since it is larger than the sum of its proper divisors (1).

86786669 is an equidigital number, since it uses as much as digits as its factorization.

86786669 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5225472, while the sum is 56.

The square root of 86786669 is about 9315.9362921823. The cubic root of 86786669 is about 442.7422895607.

The spelling of 86786669 in words is "eighty-six million, seven hundred eighty-six thousand, six hundred sixty-nine".