973981495889 has 2 divisors, whose sum is σ = 973981495890. Its totient is φ = 973981495888.

The previous prime is 973981495789. The next prime is 973981495891. The reversal of 973981495889 is 988594189379.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 519685275664 + 454296220225 = 720892^2 + 674015^2 .

It is a cyclic number.

It is not a de Polignac number, because 973981495889 - 2²⁴ = 973964718673 is a prime.

Together with 973981495891, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (973981495189) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 486990747944 + 486990747945.

It is an arithmetic number, because the mean of its divisors is an integer number (486990747945).

Almost surely, 2^973981495889 is an apocalyptic number.

It is an amenable number.

973981495889 is a deficient number, since it is larger than the sum of its proper divisors (1).

973981495889 is an equidigital number, since it uses as much as digits as its factorization.

973981495889 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1410877440, while the sum is 80.

The spelling of 973981495889 in words is "nine hundred seventy-three billion, nine hundred eighty-one million, four hundred ninety-five thousand, eight hundred eighty-nine".