870031 has 2 divisors, whose sum is σ = 870032. Its totient is φ = 870030.

The previous prime is 870013. The next prime is 870047. The reversal of 870031 is 130078.

Together with previous prime (870013) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-870031 is a prime.

It is a super-2 number, since 2×870031² = 1513907881922, which contains 22 as substring.

It is a Chen prime.

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 869990 and 870008.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (870131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 435015 + 435016.

It is an arithmetic number, because the mean of its divisors is an integer number (435016).

2⁸⁷⁰⁰³¹ is an apocalyptic number.

870031 is a deficient number, since it is larger than the sum of its proper divisors (1).

870031 is an equidigital number, since it uses as much as digits as its factorization.

870031 is an odious number, because the sum of its binary digits is odd.

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

The square root of 870031 is about 932.7545229051. The cubic root of 870031 is about 95.4651609441.

The spelling of 870031 in words is "eight hundred seventy thousand, thirty-one".