971489933653 has 2 divisors, whose sum is σ = 971489933654. Its totient is φ = 971489933652.

The previous prime is 971489933647. The next prime is 971489933731. The reversal of 971489933653 is 356339984179.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 515376102609 + 456113831044 = 717897^2 + 675362^2 .

It is a cyclic number.

It is not a de Polignac number, because 971489933653 - 2³⁷ = 834050980181 is a prime.

It is a super-2 number, since 2×971489933653² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (971489933053) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 485744966826 + 485744966827.

It is an arithmetic number, because the mean of its divisors is an integer number (485744966827).

Almost surely, 2^971489933653 is an apocalyptic number.

It is an amenable number.

971489933653 is a deficient number, since it is larger than the sum of its proper divisors (1).

971489933653 is an equidigital number, since it uses as much as digits as its factorization.

971489933653 is an evil number, because the sum of its binary digits is even.

The product of its digits is 132269760, while the sum is 67.

The spelling of 971489933653 in words is "nine hundred seventy-one billion, four hundred eighty-nine million, nine hundred thirty-three thousand, six hundred fifty-three".