870860643 has 4 divisors (see below), whose sum is σ = 1161147528. Its totient is φ = 580573760.

The previous prime is 870860609. The next prime is 870860657. The reversal of 870860643 is 346068078.

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

It is a cyclic number.

It is not a de Polignac number, because 870860643 - 2⁶ = 870860579 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 870860595 and 870860604.

It is not an unprimeable number, because it can be changed into a prime (870860693) 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, 145143438 + ... + 145143443.

It is an arithmetic number, because the mean of its divisors is an integer number (290286882).

Almost surely, 2^870860643 is an apocalyptic number.

870860643 is a deficient number, since it is larger than the sum of its proper divisors (290286885).

870860643 is a wasteful number, since it uses less digits than its factorization.

870860643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 290286884.

The product of its (nonzero) digits is 193536, while the sum is 42.

The square root of 870860643 is about 29510.3480663987. The cubic root of 870860643 is about 954.9549581746.

The spelling of 870860643 in words is "eight hundred seventy million, eight hundred sixty thousand, six hundred forty-three".