860001391 has 2 divisors, whose sum is σ = 860001392. Its totient is φ = 860001390.

The previous prime is 860001377. The next prime is 860001449. The reversal of 860001391 is 193100068.

It is a happy number.

860001391 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 860001391 - 2²¹ = 857904239 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (860001301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 430000695 + 430000696.

It is an arithmetic number, because the mean of its divisors is an integer number (430000696).

Almost surely, 2^860001391 is an apocalyptic number.

860001391 is a deficient number, since it is larger than the sum of its proper divisors (1).

860001391 is an equidigital number, since it uses as much as digits as its factorization.

860001391 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1296, while the sum is 28.

The square root of 860001391 is about 29325.7803135739. The cubic root of 860001391 is about 950.9690540176.

The spelling of 860001391 in words is "eight hundred sixty million, one thousand, three hundred ninety-one".