864577243 has 2 divisors, whose sum is σ = 864577244. Its totient is φ = 864577242.

The previous prime is 864577223. The next prime is 864577289. The reversal of 864577243 is 342775468.

It is an a-pointer prime, because the next prime (864577289) can be obtained adding 864577243 to its sum of digits (46).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 864577243 - 2¹⁷ = 864446171 is a prime.

It is a super-2 number, since 2×864577243² = 1494987618226962098, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 864577193 and 864577202.

It is not a weakly prime, because it can be changed into another prime (864577213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 432288621 + 432288622.

It is an arithmetic number, because the mean of its divisors is an integer number (432288622).

Almost surely, 2^864577243 is an apocalyptic number.

864577243 is a deficient number, since it is larger than the sum of its proper divisors (1).

864577243 is an equidigital number, since it uses as much as digits as its factorization.

864577243 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1128960, while the sum is 46.

The square root of 864577243 is about 29403.6943767276. The cubic root of 864577243 is about 952.6526941800.

The spelling of 864577243 in words is "eight hundred sixty-four million, five hundred seventy-seven thousand, two hundred forty-three".