71310643 has 2 divisors, whose sum is σ = 71310644. Its totient is φ = 71310642.

The previous prime is 71310637. The next prime is 71310653. The reversal of 71310643 is 34601317.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 71310643 - 2⁵ = 71310611 is a prime.

It is not a weakly prime, because it can be changed into another prime (71310653) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35655321 + 35655322.

It is an arithmetic number, because the mean of its divisors is an integer number (35655322).

Almost surely, 2^71310643 is an apocalyptic number.

71310643 is a deficient number, since it is larger than the sum of its proper divisors (1).

71310643 is an equidigital number, since it uses as much as digits as its factorization.

71310643 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1512, while the sum is 25.

The square root of 71310643 is about 8444.5629253384. The cubic root of 71310643 is about 414.6848005801.

The spelling of 71310643 in words is "seventy-one million, three hundred ten thousand, six hundred forty-three".