864525397 has 2 divisors, whose sum is σ = 864525398. Its totient is φ = 864525396.

The previous prime is 864525391. The next prime is 864525413. The reversal of 864525397 is 793525468.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 782097156 + 82428241 = 27966^2 + 9079^2 .

It is a cyclic number.

It is not a de Polignac number, because 864525397 - 2¹⁹ = 864001109 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 864525397.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (864525391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 432262698 + 432262699.

It is an arithmetic number, because the mean of its divisors is an integer number (432262699).

Almost surely, 2^864525397 is an apocalyptic number.

It is an amenable number.

864525397 is a deficient number, since it is larger than the sum of its proper divisors (1).

864525397 is an equidigital number, since it uses as much as digits as its factorization.

864525397 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1814400, while the sum is 49.

The square root of 864525397 is about 29402.8127396003. The cubic root of 864525397 is about 952.6336512626.

The spelling of 864525397 in words is "eight hundred sixty-four million, five hundred twenty-five thousand, three hundred ninety-seven".