864531361 has 2 divisors, whose sum is σ = 864531362. Its totient is φ = 864531360.

The previous prime is 864531329. The next prime is 864531373. The reversal of 864531361 is 163135468.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 839840400 + 24690961 = 28980^2 + 4969^2 .

It is a cyclic number.

It is not a de Polignac number, because 864531361 - 2⁵ = 864531329 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 864531361.

It is not a weakly prime, because it can be changed into another prime (864534361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 432265680 + 432265681.

It is an arithmetic number, because the mean of its divisors is an integer number (432265681).

Almost surely, 2^864531361 is an apocalyptic number.

It is an amenable number.

864531361 is a deficient number, since it is larger than the sum of its proper divisors (1).

864531361 is an equidigital number, since it uses as much as digits as its factorization.

864531361 is an evil number, because the sum of its binary digits is even.

The product of its digits is 51840, while the sum is 37.

The square root of 864531361 is about 29402.9141582939. The cubic root of 864531361 is about 952.6358418650.

The spelling of 864531361 in words is "eight hundred sixty-four million, five hundred thirty-one thousand, three hundred sixty-one".