864408697 has 2 divisors, whose sum is σ = 864408698. Its totient is φ = 864408696.

The previous prime is 864408637. The next prime is 864408709. The reversal of 864408697 is 796804468.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 776123881 + 88284816 = 27859^2 + 9396^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-864408697 is a prime.

It is not a weakly prime, because it can be changed into another prime (864408637) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 432204348 + 432204349.

It is an arithmetic number, because the mean of its divisors is an integer number (432204349).

Almost surely, 2^864408697 is an apocalyptic number.

It is an amenable number.

864408697 is a deficient number, since it is larger than the sum of its proper divisors (1).

864408697 is an equidigital number, since it uses as much as digits as its factorization.

864408697 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2322432, while the sum is 52.

The square root of 864408697 is about 29400.8281686078. The cubic root of 864408697 is about 952.5907848336.

The spelling of 864408697 in words is "eight hundred sixty-four million, four hundred eight thousand, six hundred ninety-seven".