870423689 has 2 divisors, whose sum is σ = 870423690. Its totient is φ = 870423688.

The previous prime is 870423683. The next prime is 870423721. The reversal of 870423689 is 986324078.

870423689 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 864830464 + 5593225 = 29408^2 + 2365^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-870423689 is a prime.

It is a super-3 number, since 3×870423689³ (a number of 28 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (870423683) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 435211844 + 435211845.

It is an arithmetic number, because the mean of its divisors is an integer number (435211845).

Almost surely, 2^870423689 is an apocalyptic number.

It is an amenable number.

870423689 is a deficient number, since it is larger than the sum of its proper divisors (1).

870423689 is an equidigital number, since it uses as much as digits as its factorization.

870423689 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 580608, while the sum is 47.

The square root of 870423689 is about 29502.9437344818. The cubic root of 870423689 is about 954.7952153577.

The spelling of 870423689 in words is "eight hundred seventy million, four hundred twenty-three thousand, six hundred eighty-nine".