870678263327921 has 2 divisors, whose sum is σ = 870678263327922. Its totient is φ = 870678263327920.

The previous prime is 870678263327813. The next prime is 870678263327989. The reversal of 870678263327921 is 129723362876078.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 479367553847296 + 391310709480625 = 21894464^2 + 19781575^2 .

It is a cyclic number.

It is not a de Polignac number, because 870678263327921 - 2³⁰ = 870677189586097 is a prime.

It is not a weakly prime, because it can be changed into another prime (870678263327021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 435339131663960 + 435339131663961.

It is an arithmetic number, because the mean of its divisors is an integer number (435339131663961).

Almost surely, 2^{870678263327921} is an apocalyptic number.

It is an amenable number.

870678263327921 is a deficient number, since it is larger than the sum of its proper divisors (1).

870678263327921 is an equidigital number, since it uses as much as digits as its factorization.

870678263327921 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 512096256, while the sum is 71.

The spelling of 870678263327921 in words is "eight hundred seventy trillion, six hundred seventy-eight billion, two hundred sixty-three million, three hundred twenty-seven thousand, nine hundred twenty-one".