71936047 has 4 divisors (see below), whose sum is σ = 71966520. Its totient is φ = 71905576.

The previous prime is 71936041. The next prime is 71936063. The reversal of 71936047 is 74063917.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71936047 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 71935997 and 71936015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71936041) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11368 + ... + 16525.

It is an arithmetic number, because the mean of its divisors is an integer number (17991630).

Almost surely, 2^71936047 is an apocalyptic number.

71936047 is a deficient number, since it is larger than the sum of its proper divisors (30473).

71936047 is a wasteful number, since it uses less digits than its factorization.

71936047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30472.

The product of its (nonzero) digits is 31752, while the sum is 37.

The square root of 71936047 is about 8481.5120703799. The cubic root of 71936047 is about 415.8935544189.

The spelling of 71936047 in words is "seventy-one million, nine hundred thirty-six thousand, forty-seven".