71304313 has 2 divisors, whose sum is σ = 71304314. Its totient is φ = 71304312.

The previous prime is 71304293. The next prime is 71304319. The reversal of 71304313 is 31340317.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 68508729 + 2795584 = 8277^2 + 1672^2 .

It is an emirp because it is prime and its reverse (31340317) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71304313 is a prime.

It is not a weakly prime, because it can be changed into another prime (71304319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35652156 + 35652157.

It is an arithmetic number, because the mean of its divisors is an integer number (35652157).

Almost surely, 2^71304313 is an apocalyptic number.

It is an amenable number.

71304313 is a deficient number, since it is larger than the sum of its proper divisors (1).

71304313 is an equidigital number, since it uses as much as digits as its factorization.

71304313 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 756, while the sum is 22.

The square root of 71304313 is about 8444.1881196477. The cubic root of 71304313 is about 414.6725301702.

It can be divided in two parts, 71304 and 313, that added together give a palindrome (71617).

The spelling of 71304313 in words is "seventy-one million, three hundred four thousand, three hundred thirteen".