86220287 has 2 divisors, whose sum is σ = 86220288. Its totient is φ = 86220286.

The previous prime is 86220247. The next prime is 86220301. The reversal of 86220287 is 78202268.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 86220287 - 2¹² = 86216191 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (86220247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43110143 + 43110144.

It is an arithmetic number, because the mean of its divisors is an integer number (43110144).

Almost surely, 2^86220287 is an apocalyptic number.

86220287 is a deficient number, since it is larger than the sum of its proper divisors (1).

86220287 is an equidigital number, since it uses as much as digits as its factorization.

86220287 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 21504, while the sum is 35.

The square root of 86220287 is about 9285.4879785610. The cubic root of 86220287 is about 441.7770539477. Note that the first 3 decimals are identical.

The spelling of 86220287 in words is "eighty-six million, two hundred twenty thousand, two hundred eighty-seven".