897302769721 has 2 divisors, whose sum is σ = 897302769722. Its totient is φ = 897302769720.

The previous prime is 897302769691. The next prime is 897302769743. The reversal of 897302769721 is 127967203798.

897302769721 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 602193072121 + 295109697600 = 776011^2 + 543240^2 .

It is a cyclic number.

It is not a de Polignac number, because 897302769721 - 2⁵ = 897302769689 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 897302769721.

It is not a weakly prime, because it can be changed into another prime (897302769791) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 448651384860 + 448651384861.

It is an arithmetic number, because the mean of its divisors is an integer number (448651384861).

Almost surely, 2^897302769721 is an apocalyptic number.

It is an amenable number.

897302769721 is a deficient number, since it is larger than the sum of its proper divisors (1).

897302769721 is an equidigital number, since it uses as much as digits as its factorization.

897302769721 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16003008, while the sum is 61.

The spelling of 897302769721 in words is "eight hundred ninety-seven billion, three hundred two million, seven hundred sixty-nine thousand, seven hundred twenty-one".