897129921443 has 24 divisors (see below), whose sum is σ = 1071693290304. Its totient is φ = 748449072000.

The previous prime is 897129921403. The next prime is 897129921463. The reversal of 897129921443 is 344129921798.

It is not a de Polignac number, because 897129921443 - 2⁶ = 897129921379 is a prime.

It is not an unprimeable number, because it can be changed into a prime (897129921403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 659258 + ... + 1492943.

It is an arithmetic number, because the mean of its divisors is an integer number (44653887096).

Almost surely, 2^897129921443 is an apocalyptic number.

897129921443 is a deficient number, since it is larger than the sum of its proper divisors (174563368861).

897129921443 is a wasteful number, since it uses less digits than its factorization.

897129921443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2152443 (or 2152436 counting only the distinct ones).

The product of its digits is 7838208, while the sum is 59.

The spelling of 897129921443 in words is "eight hundred ninety-seven billion, one hundred twenty-nine million, nine hundred twenty-one thousand, four hundred forty-three".