868613897 has 2 divisors, whose sum is σ = 868613898. Its totient is φ = 868613896.

The previous prime is 868613891. The next prime is 868613917. The reversal of 868613897 is 798316868.

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., 644093641 + 224520256 = 25379^2 + 14984^2 .

It is a cyclic number.

It is not a de Polignac number, because 868613897 - 2¹⁶ = 868548361 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (868613891) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 434306948 + 434306949.

It is an arithmetic number, because the mean of its divisors is an integer number (434306949).

Almost surely, 2^868613897 is an apocalyptic number.

It is an amenable number.

868613897 is a deficient number, since it is larger than the sum of its proper divisors (1).

868613897 is an equidigital number, since it uses as much as digits as its factorization.

868613897 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3483648, while the sum is 56.

The square root of 868613897 is about 29472.2563947859. The cubic root of 868613897 is about 954.1330168751.

The spelling of 868613897 in words is "eight hundred sixty-eight million, six hundred thirteen thousand, eight hundred ninety-seven".