71947653 has 12 divisors (see below), whose sum is σ = 96930624. Its totient is φ = 47470000.

The previous prime is 71947649. The next prime is 71947669. The reversal of 71947653 is 35674917.

It is not a de Polignac number, because 71947653 - 2² = 71947649 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71947613) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 29428 + ... + 31778.

It is an arithmetic number, because the mean of its divisors is an integer number (8077552).

Almost surely, 2^71947653 is an apocalyptic number.

It is an amenable number.

71947653 is a deficient number, since it is larger than the sum of its proper divisors (24982971).

71947653 is a wasteful number, since it uses less digits than its factorization.

71947653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2556 (or 2455 counting only the distinct ones).

The product of its digits is 158760, while the sum is 42.

The square root of 71947653 is about 8482.1962368245. The cubic root of 71947653 is about 415.9159196596.

The spelling of 71947653 in words is "seventy-one million, nine hundred forty-seven thousand, six hundred fifty-three".