71339663 has 4 divisors (see below), whose sum is σ = 73267800. Its totient is φ = 69411528.

The previous prime is 71339659. The next prime is 71339669. The reversal of 71339663 is 36693317.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 71339663 - 2² = 71339659 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71339669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 964013 + ... + 964086.

It is an arithmetic number, because the mean of its divisors is an integer number (18316950).

Almost surely, 2^71339663 is an apocalyptic number.

71339663 is a deficient number, since it is larger than the sum of its proper divisors (1928137).

71339663 is a wasteful number, since it uses less digits than its factorization.

71339663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1928136.

The product of its digits is 61236, while the sum is 38.

The square root of 71339663 is about 8446.2810159265. The cubic root of 71339663 is about 414.7410452038.

The spelling of 71339663 in words is "seventy-one million, three hundred thirty-nine thousand, six hundred sixty-three".