71395663 has 2 divisors, whose sum is σ = 71395664. Its totient is φ = 71395662.

The previous prime is 71395619. The next prime is 71395721. The reversal of 71395663 is 36659317.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71395663 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71392663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35697831 + 35697832.

It is an arithmetic number, because the mean of its divisors is an integer number (35697832).

Almost surely, 2^71395663 is an apocalyptic number.

71395663 is a deficient number, since it is larger than the sum of its proper divisors (1).

71395663 is an equidigital number, since it uses as much as digits as its factorization.

71395663 is an evil number, because the sum of its binary digits is even.

The product of its digits is 102060, while the sum is 40.

The square root of 71395663 is about 8449.5954341022. The cubic root of 71395663 is about 414.8495375583.

The spelling of 71395663 in words is "seventy-one million, three hundred ninety-five thousand, six hundred sixty-three".