71240347 has 2 divisors, whose sum is σ = 71240348. Its totient is φ = 71240346.

The previous prime is 71240243. The next prime is 71240369. The reversal of 71240347 is 74304217.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71240347 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (71240447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35620173 + 35620174.

It is an arithmetic number, because the mean of its divisors is an integer number (35620174).

Almost surely, 2^71240347 is an apocalyptic number.

71240347 is a deficient number, since it is larger than the sum of its proper divisors (1).

71240347 is an equidigital number, since it uses as much as digits as its factorization.

71240347 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4704, while the sum is 28.

The square root of 71240347 is about 8440.3996943273. The cubic root of 71240347 is about 414.5484942944.

The spelling of 71240347 in words is "seventy-one million, two hundred forty thousand, three hundred forty-seven".