870949 has 4 divisors (see below), whose sum is σ = 887436. Its totient is φ = 854464.

The previous prime is 870931. The next prime is 870953. The reversal of 870949 is 949078.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 777924 + 93025 = 882^2 + 305^2 .

It is a cyclic number.

It is not a de Polignac number, because 870949 - 2⁵ = 870917 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (870929) 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, 8164 + ... + 8269.

It is an arithmetic number, because the mean of its divisors is an integer number (221859).

2⁸⁷⁰⁹⁴⁹ is an apocalyptic number.

It is an amenable number.

870949 is a deficient number, since it is larger than the sum of its proper divisors (16487).

870949 is a wasteful number, since it uses less digits than its factorization.

870949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16486.

The product of its (nonzero) digits is 18144, while the sum is 37.

The square root of 870949 is about 933.2464840545. The cubic root of 870949 is about 95.4987253469.

The spelling of 870949 in words is "eight hundred seventy thousand, nine hundred forty-nine".