870877627721 has 2 divisors, whose sum is σ = 870877627722. Its totient is φ = 870877627720.

The previous prime is 870877627703. The next prime is 870877627727. The reversal of 870877627721 is 127726778078.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 781243854400 + 89633773321 = 883880^2 + 299389^2 .

It is a cyclic number.

It is not a de Polignac number, because 870877627721 - 2¹⁴ = 870877611337 is a prime.

It is not a weakly prime, because it can be changed into another prime (870877627727) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 435438813860 + 435438813861.

It is an arithmetic number, because the mean of its divisors is an integer number (435438813861).

Almost surely, 2^870877627721 is an apocalyptic number.

It is an amenable number.

870877627721 is a deficient number, since it is larger than the sum of its proper divisors (1).

870877627721 is an equidigital number, since it uses as much as digits as its factorization.

870877627721 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25815552, while the sum is 62.

The spelling of 870877627721 in words is "eight hundred seventy billion, eight hundred seventy-seven million, six hundred twenty-seven thousand, seven hundred twenty-one".