864078487 has 2 divisors, whose sum is σ = 864078488. Its totient is φ = 864078486.

The previous prime is 864078473. The next prime is 864078491. The reversal of 864078487 is 784870468.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-864078487 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (864078437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 432039243 + 432039244.

It is an arithmetic number, because the mean of its divisors is an integer number (432039244).

Almost surely, 2^864078487 is an apocalyptic number.

864078487 is a deficient number, since it is larger than the sum of its proper divisors (1).

864078487 is an equidigital number, since it uses as much as digits as its factorization.

864078487 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2408448, while the sum is 52.

The square root of 864078487 is about 29395.2119740614. The cubic root of 864078487 is about 952.4694706656.

The spelling of 864078487 in words is "eight hundred sixty-four million, seventy-eight thousand, four hundred eighty-seven".