71308243 has 2 divisors, whose sum is σ = 71308244. Its totient is φ = 71308242.

The previous prime is 71308231. The next prime is 71308247. The reversal of 71308243 is 34280317.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 71308243 - 2¹³ = 71300051 is a prime.

It is a super-3 number, since 3×71308243³ (a number of 25 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (71308247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35654121 + 35654122.

It is an arithmetic number, because the mean of its divisors is an integer number (35654122).

Almost surely, 2^71308243 is an apocalyptic number.

71308243 is a deficient number, since it is larger than the sum of its proper divisors (1).

71308243 is an equidigital number, since it uses as much as digits as its factorization.

71308243 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4032, while the sum is 28.

The square root of 71308243 is about 8444.4208208734. The cubic root of 71308243 is about 414.6801483775.

The spelling of 71308243 in words is "seventy-one million, three hundred eight thousand, two hundred forty-three".