870013 has 2 divisors, whose sum is σ = 870014. Its totient is φ = 870012.

The previous prime is 870007. The next prime is 870031. The reversal of 870013 is 310078.

Together with next prime (870031) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 597529 + 272484 = 773^2 + 522^2 .

It is a cyclic number.

It is not a de Polignac number, because 870013 - 2⁹ = 869501 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (870083) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 435006 + 435007.

It is an arithmetic number, because the mean of its divisors is an integer number (435007).

2⁸⁷⁰⁰¹³ is an apocalyptic number.

It is an amenable number.

870013 is a deficient number, since it is larger than the sum of its proper divisors (1).

870013 is an equidigital number, since it uses as much as digits as its factorization.

870013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 168, while the sum is 19.

The square root of 870013 is about 932.7448740143. The cubic root of 870013 is about 95.4645025826.

It can be divided in two parts, 87001 and 3, that multiplied together give a triangular number (261003 = T₇₂₂).

The spelling of 870013 in words is "eight hundred seventy thousand, thirteen".