870870845 has 8 divisors (see below), whose sum is σ = 1125433176. Its totient is φ = 643104576.

The previous prime is 870870823. The next prime is 870870881. The reversal of 870870845 is 548078078.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 8508889 + 862361956 = 2917^2 + 29366^2 .

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 870870845 - 2¹² = 870866749 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 870870845.

It is a congruent number.

It is an unprimeable number.

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, 6698942 + ... + 6699071.

It is an arithmetic number, because the mean of its divisors is an integer number (140679147).

Almost surely, 2^870870845 is an apocalyptic number.

It is an amenable number.

870870845 is a deficient number, since it is larger than the sum of its proper divisors (254562331).

870870845 is a wasteful number, since it uses less digits than its factorization.

870870845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13398031.

The product of its (nonzero) digits is 501760, while the sum is 47.

The square root of 870870845 is about 29510.5209205124. The cubic root of 870870845 is about 954.9586872108.

The spelling of 870870845 in words is "eight hundred seventy million, eight hundred seventy thousand, eight hundred forty-five".