81268097 has 2 divisors, whose sum is σ = 81268098. Its totient is φ = 81268096.

The previous prime is 81268087. The next prime is 81268129. The reversal of 81268097 is 79086218.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 74632321 + 6635776 = 8639^2 + 2576^2 .

It is a cyclic number.

It is not a de Polignac number, because 81268097 - 2²⁰ = 80219521 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (81268037) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40634048 + 40634049.

It is an arithmetic number, because the mean of its divisors is an integer number (40634049).

Almost surely, 2^81268097 is an apocalyptic number.

It is an amenable number.

81268097 is a deficient number, since it is larger than the sum of its proper divisors (1).

81268097 is an equidigital number, since it uses as much as digits as its factorization.

81268097 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48384, while the sum is 41.

The square root of 81268097 is about 9014.8819737144. The cubic root of 81268097 is about 433.1517068558.

The spelling of 81268097 in words is "eighty-one million, two hundred sixty-eight thousand, ninety-seven".