870047 has 2 divisors, whose sum is σ = 870048. Its totient is φ = 870046.

The previous prime is 870031. The next prime is 870049. The reversal of 870047 is 740078.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 870047 - 2⁴ = 870031 is a prime.

Together with 870049, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 869998 and 870025.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 870047.

It is not a weakly prime, because it can be changed into another prime (870049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 435023 + 435024.

It is an arithmetic number, because the mean of its divisors is an integer number (435024).

2⁸⁷⁰⁰⁴⁷ is an apocalyptic number.

870047 is a deficient number, since it is larger than the sum of its proper divisors (1).

870047 is an equidigital number, since it uses as much as digits as its factorization.

870047 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1568, while the sum is 26.

The square root of 870047 is about 932.7630996132. The cubic root of 870047 is about 95.4657461467.

The spelling of 870047 in words is "eight hundred seventy thousand, forty-seven".