864184897 has 2 divisors, whose sum is σ = 864184898. Its totient is φ = 864184896.

The previous prime is 864184873. The next prime is 864184933. The reversal of 864184897 is 798481468.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 813618576 + 50566321 = 28524^2 + 7111^2 .

It is a cyclic number.

It is not a de Polignac number, because 864184897 - 2¹¹ = 864182849 is a prime.

It is not a weakly prime, because it can be changed into another prime (864184597) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 432092448 + 432092449.

It is an arithmetic number, because the mean of its divisors is an integer number (432092449).

Almost surely, 2^864184897 is an apocalyptic number.

It is an amenable number.

864184897 is a deficient number, since it is larger than the sum of its proper divisors (1).

864184897 is an equidigital number, since it uses as much as digits as its factorization.

864184897 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3096576, while the sum is 55.

The square root of 864184897 is about 29397.0219069891. The cubic root of 864184897 is about 952.5085674675.

It can be divided in two parts, 864 and 184897, that added together give a square (185761 = 431²).

The spelling of 864184897 in words is "eight hundred sixty-four million, one hundred eighty-four thousand, eight hundred ninety-seven".