870647 has 4 divisors (see below), whose sum is σ = 894216. Its totient is φ = 847080.

The previous prime is 870643. The next prime is 870679. The reversal of 870647 is 746078.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 870647 - 2² = 870643 is a prime.

It is a super-4 number, since 4×870647⁴ (a number of 25 digits) contains 4444 as substring.

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 870647.

It is not an unprimeable number, because it can be changed into a prime (870641) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11729 + ... + 11802.

It is an arithmetic number, because the mean of its divisors is an integer number (223554).

2⁸⁷⁰⁶⁴⁷ is an apocalyptic number.

870647 is a deficient number, since it is larger than the sum of its proper divisors (23569).

870647 is a wasteful number, since it uses less digits than its factorization.

870647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23568.

The product of its (nonzero) digits is 9408, while the sum is 32.

The square root of 870647 is about 933.0846692557. The cubic root of 870647 is about 95.4876860670.

The spelling of 870647 in words is "eight hundred seventy thousand, six hundred forty-seven".