997082131589 has 2 divisors, whose sum is σ = 997082131590. Its totient is φ = 997082131588.

The previous prime is 997082131567. The next prime is 997082131657. The reversal of 997082131589 is 985131280799.

997082131589 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 743889000100 + 253193131489 = 862490^2 + 503183^2 .

It is a cyclic number.

It is not a de Polignac number, because 997082131589 - 2⁸ = 997082131333 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (997082130589) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 498541065794 + 498541065795.

It is an arithmetic number, because the mean of its divisors is an integer number (498541065795).

Almost surely, 2^997082131589 is an apocalyptic number.

It is an amenable number.

997082131589 is a deficient number, since it is larger than the sum of its proper divisors (1).

997082131589 is an equidigital number, since it uses as much as digits as its factorization.

997082131589 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9797760, while the sum is 62.

The spelling of 997082131589 in words is "nine hundred ninety-seven billion, eighty-two million, one hundred thirty-one thousand, five hundred eighty-nine".