864386519 has 2 divisors, whose sum is σ = 864386520. Its totient is φ = 864386518.

The previous prime is 864386507. The next prime is 864386569. The reversal of 864386519 is 915683468.

It is an a-pointer prime, because the next prime (864386569) can be obtained adding 864386519 to its sum of digits (50).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 864386519 - 2¹⁶ = 864320983 is a prime.

It is a super-2 number, since 2×864386519² = 1494328108457874722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (864386569) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 432193259 + 432193260.

It is an arithmetic number, because the mean of its divisors is an integer number (432193260).

Almost surely, 2^864386519 is an apocalyptic number.

864386519 is a deficient number, since it is larger than the sum of its proper divisors (1).

864386519 is an equidigital number, since it uses as much as digits as its factorization.

864386519 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1244160, while the sum is 50.

The square root of 864386519 is about 29400.4509999422. The cubic root of 864386519 is about 952.5826379392.

The spelling of 864386519 in words is "eight hundred sixty-four million, three hundred eighty-six thousand, five hundred nineteen".