71047643 has 2 divisors, whose sum is σ = 71047644. Its totient is φ = 71047642.

The previous prime is 71047637. The next prime is 71047663. The reversal of 71047643 is 34674017.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 71047643 - 2⁶ = 71047579 is a prime.

It is not a weakly prime, because it can be changed into another prime (71047633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35523821 + 35523822.

It is an arithmetic number, because the mean of its divisors is an integer number (35523822).

Almost surely, 2^71047643 is an apocalyptic number.

71047643 is a deficient number, since it is larger than the sum of its proper divisors (1).

71047643 is an equidigital number, since it uses as much as digits as its factorization.

71047643 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 14112, while the sum is 32.

The square root of 71047643 is about 8428.9763909979. The cubic root of 71047643 is about 414.1743744115.

The spelling of 71047643 in words is "seventy-one million, forty-seven thousand, six hundred forty-three".