71893861 has 8 divisors (see below), whose sum is σ = 77713664. Its totient is φ = 66115440.

The previous prime is 71893793. The next prime is 71893903. The reversal of 71893861 is 16839817.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71893861 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 (71893361) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6681 + ... + 13726.

It is an arithmetic number, because the mean of its divisors is an integer number (9714208).

Almost surely, 2^71893861 is an apocalyptic number.

It is an amenable number.

71893861 is a deficient number, since it is larger than the sum of its proper divisors (5819803).

71893861 is a wasteful number, since it uses less digits than its factorization.

71893861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20691.

The product of its digits is 72576, while the sum is 43.

The square root of 71893861 is about 8479.0247670354. The cubic root of 71893861 is about 415.8122399875.

The spelling of 71893861 in words is "seventy-one million, eight hundred ninety-three thousand, eight hundred sixty-one".