870639213 has 16 divisors (see below), whose sum is σ = 1169251200. Its totient is φ = 576242880.

The previous prime is 870639199. The next prime is 870639269. The reversal of 870639213 is 312936078.

It is not a de Polignac number, because 870639213 - 2⁴ = 870639197 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (870639113) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 249243 + ... + 252711.

It is an arithmetic number, because the mean of its divisors is an integer number (73078200).

Almost surely, 2^870639213 is an apocalyptic number.

It is an amenable number.

870639213 is a deficient number, since it is larger than the sum of its proper divisors (298611987).

870639213 is a wasteful number, since it uses less digits than its factorization.

870639213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4052.

The product of its (nonzero) digits is 54432, while the sum is 39.

The square root of 870639213 is about 29506.5960930772. The cubic root of 870639213 is about 954.8740138802.

The spelling of 870639213 in words is "eight hundred seventy million, six hundred thirty-nine thousand, two hundred thirteen".