870961873 has 2 divisors, whose sum is σ = 870961874. Its totient is φ = 870961872.

The previous prime is 870961849. The next prime is 870961913. The reversal of 870961873 is 378169078.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 627352209 + 243609664 = 25047^2 + 15608^2 .

It is a cyclic number.

It is not a de Polignac number, because 870961873 - 2⁹ = 870961361 is a prime.

It is not a weakly prime, because it can be changed into another prime (870961373) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 435480936 + 435480937.

It is an arithmetic number, because the mean of its divisors is an integer number (435480937).

Almost surely, 2^870961873 is an apocalyptic number.

It is an amenable number.

870961873 is a deficient number, since it is larger than the sum of its proper divisors (1).

870961873 is an equidigital number, since it uses as much as digits as its factorization.

870961873 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 508032, while the sum is 49.

The square root of 870961873 is about 29512.0631776228. The cubic root of 870961873 is about 954.9919584861.

The spelling of 870961873 in words is "eight hundred seventy million, nine hundred sixty-one thousand, eight hundred seventy-three".