868404917 has 2 divisors, whose sum is σ = 868404918. Its totient is φ = 868404916.

The previous prime is 868404881. The next prime is 868404923. The reversal of 868404917 is 719404868.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 830938276 + 37466641 = 28826^2 + 6121^2 .

It is a cyclic number.

It is not a de Polignac number, because 868404917 - 2¹² = 868400821 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (868404517) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 434202458 + 434202459.

It is an arithmetic number, because the mean of its divisors is an integer number (434202459).

Almost surely, 2^868404917 is an apocalyptic number.

It is an amenable number.

868404917 is a deficient number, since it is larger than the sum of its proper divisors (1).

868404917 is an equidigital number, since it uses as much as digits as its factorization.

868404917 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 387072, while the sum is 47.

The square root of 868404917 is about 29468.7108133356. The cubic root of 868404917 is about 954.0564923834.

The spelling of 868404917 in words is "eight hundred sixty-eight million, four hundred four thousand, nine hundred seventeen".