86420287 has 2 divisors, whose sum is σ = 86420288. Its totient is φ = 86420286.

The previous prime is 86420209. The next prime is 86420293. The reversal of 86420287 is 78202468.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 86420287 - 2¹⁵ = 86387519 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (86420207) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43210143 + 43210144.

It is an arithmetic number, because the mean of its divisors is an integer number (43210144).

Almost surely, 2^86420287 is an apocalyptic number.

86420287 is a deficient number, since it is larger than the sum of its proper divisors (1).

86420287 is an equidigital number, since it uses as much as digits as its factorization.

86420287 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 43008, while the sum is 37.

The square root of 86420287 is about 9296.2512336963. The cubic root of 86420287 is about 442.1183780305.

The spelling of 86420287 in words is "eighty-six million, four hundred twenty thousand, two hundred eighty-seven".