897169781983 has 2 divisors, whose sum is σ = 897169781984. Its totient is φ = 897169781982.

The previous prime is 897169781939. The next prime is 897169781993. The reversal of 897169781983 is 389187961798.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-897169781983 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (897169781993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 448584890991 + 448584890992.

It is an arithmetic number, because the mean of its divisors is an integer number (448584890992).

Almost surely, 2^897169781983 is an apocalyptic number.

897169781983 is a deficient number, since it is larger than the sum of its proper divisors (1).

897169781983 is an equidigital number, since it uses as much as digits as its factorization.

897169781983 is an evil number, because the sum of its binary digits is even.

The product of its digits is 329204736, while the sum is 76.

The spelling of 897169781983 in words is "eight hundred ninety-seven billion, one hundred sixty-nine million, seven hundred eighty-one thousand, nine hundred eighty-three".