860013509 has 2 divisors, whose sum is σ = 860013510. Its totient is φ = 860013508.

The previous prime is 860013503. The next prime is 860013577. The reversal of 860013509 is 905310068.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 571353409 + 288660100 = 23903^2 + 16990^2 .

It is a cyclic number.

It is not a de Polignac number, because 860013509 - 2¹⁶ = 859947973 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (860013503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 430006754 + 430006755.

It is an arithmetic number, because the mean of its divisors is an integer number (430006755).

Almost surely, 2^860013509 is an apocalyptic number.

It is an amenable number.

860013509 is a deficient number, since it is larger than the sum of its proper divisors (1).

860013509 is an equidigital number, since it uses as much as digits as its factorization.

860013509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6480, while the sum is 32.

The square root of 860013509 is about 29325.9869228642. The cubic root of 860013509 is about 950.9735205953.

The spelling of 860013509 in words is "eight hundred sixty million, thirteen thousand, five hundred nine".