868352491 has 2 divisors, whose sum is σ = 868352492. Its totient is φ = 868352490.

The previous prime is 868352479. The next prime is 868352531. The reversal of 868352491 is 194253868.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 868352491 - 2¹³ = 868344299 is a prime.

It is not a weakly prime, because it can be changed into another prime (868352291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 434176245 + 434176246.

It is an arithmetic number, because the mean of its divisors is an integer number (434176246).

Almost surely, 2^868352491 is an apocalyptic number.

868352491 is a deficient number, since it is larger than the sum of its proper divisors (1).

868352491 is an equidigital number, since it uses as much as digits as its factorization.

868352491 is an evil number, because the sum of its binary digits is even.

The product of its digits is 414720, while the sum is 46.

The square root of 868352491 is about 29467.8212801693. The cubic root of 868352491 is about 954.0372930555.

The spelling of 868352491 in words is "eight hundred sixty-eight million, three hundred fifty-two thousand, four hundred ninety-one".