870722321 has 8 divisors (see below), whose sum is σ = 1000864704. Its totient is φ = 742018320.

The previous prime is 870722317. The next prime is 870722353. The reversal of 870722321 is 123227078.

870722321 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 870722321 - 2² = 870722317 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (870722381) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 358295 + ... + 360716.

It is an arithmetic number, because the mean of its divisors is an integer number (125108088).

Almost surely, 2^870722321 is an apocalyptic number.

It is an amenable number.

870722321 is a deficient number, since it is larger than the sum of its proper divisors (130142383).

870722321 is a wasteful number, since it uses less digits than its factorization.

870722321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 719191.

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

The square root of 870722321 is about 29508.0043547509. The cubic root of 870722321 is about 954.9043958277.

Adding to 870722321 its reverse (123227078), we get a palindrome (993949399).

The spelling of 870722321 in words is "eight hundred seventy million, seven hundred twenty-two thousand, three hundred twenty-one".