71317399 has 2 divisors, whose sum is σ = 71317400. Its totient is φ = 71317398.

The previous prime is 71317387. The next prime is 71317403. The reversal of 71317399 is 99371317.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (99371317) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 71317399 - 2¹¹ = 71315351 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71317369) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35658699 + 35658700.

It is an arithmetic number, because the mean of its divisors is an integer number (35658700).

Almost surely, 2^71317399 is an apocalyptic number.

71317399 is a deficient number, since it is larger than the sum of its proper divisors (1).

71317399 is an equidigital number, since it uses as much as digits as its factorization.

71317399 is an evil number, because the sum of its binary digits is even.

The product of its digits is 35721, while the sum is 40.

The square root of 71317399 is about 8444.9629365676. The cubic root of 71317399 is about 414.6978959701.

The spelling of 71317399 in words is "seventy-one million, three hundred seventeen thousand, three hundred ninety-nine".