71298397 has 2 divisors, whose sum is σ = 71298398. Its totient is φ = 71298396.

The previous prime is 71298379. The next prime is 71298401. The reversal of 71298397 is 79389217.

It is a happy number.

Together with previous prime (71298379) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 48916036 + 22382361 = 6994^2 + 4731^2 .

It is an emirp because it is prime and its reverse (79389217) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 71298397 - 2¹¹ = 71296349 is a prime.

It is a super-2 number, since 2×71298397² = 10166922829539218, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71298347) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35649198 + 35649199.

It is an arithmetic number, because the mean of its divisors is an integer number (35649199).

Almost surely, 2^71298397 is an apocalyptic number.

It is an amenable number.

71298397 is a deficient number, since it is larger than the sum of its proper divisors (1).

71298397 is an equidigital number, since it uses as much as digits as its factorization.

71298397 is an evil number, because the sum of its binary digits is even.

The product of its digits is 190512, while the sum is 46.

The square root of 71298397 is about 8443.8378122747. The cubic root of 71298397 is about 414.6610616235.

The spelling of 71298397 in words is "seventy-one million, two hundred ninety-eight thousand, three hundred ninety-seven".