868352591 has 2 divisors, whose sum is σ = 868352592. Its totient is φ = 868352590.

The previous prime is 868352587. The next prime is 868352609. The reversal of 868352591 is 195253868.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 868352591 - 2² = 868352587 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (868352531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 434176295 + 434176296.

It is an arithmetic number, because the mean of its divisors is an integer number (434176296).

Almost surely, 2^868352591 is an apocalyptic number.

868352591 is a deficient number, since it is larger than the sum of its proper divisors (1).

868352591 is an equidigital number, since it uses as much as digits as its factorization.

868352591 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 518400, while the sum is 47.

The square root of 868352591 is about 29467.8229769354. The cubic root of 868352591 is about 954.0373296780.

The spelling of 868352591 in words is "eight hundred sixty-eight million, three hundred fifty-two thousand, five hundred ninety-one".