870704821 has 8 divisors (see below), whose sum is σ = 995692544. Its totient is φ = 745867440.

The previous prime is 870704819. The next prime is 870704833. The reversal of 870704821 is 128407078.

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 870704821 - 2¹ = 870704819 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (870704801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24885 + ... + 48586.

It is an arithmetic number, because the mean of its divisors is an integer number (124461568).

Almost surely, 2^870704821 is an apocalyptic number.

It is an amenable number.

870704821 is a deficient number, since it is larger than the sum of its proper divisors (124987723).

870704821 is a wasteful number, since it uses less digits than its factorization.

870704821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75171.

The product of its (nonzero) digits is 25088, while the sum is 37.

The square root of 870704821 is about 29507.7078235501. The cubic root of 870704821 is about 954.8979984806.

The spelling of 870704821 in words is "eight hundred seventy million, seven hundred four thousand, eight hundred twenty-one".