71093661 has 8 divisors (see below), whose sum is σ = 94950144. Its totient is φ = 47316480.

The previous prime is 71093651. The next prime is 71093681. The reversal of 71093661 is 16639017.

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

It is not a de Polignac number, because 71093661 - 2⁵ = 71093629 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71093641) 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, 17700 + ... + 21341.

It is an arithmetic number, because the mean of its divisors is an integer number (11868768).

Almost surely, 2^71093661 is an apocalyptic number.

It is an amenable number.

71093661 is a deficient number, since it is larger than the sum of its proper divisors (23856483).

71093661 is a wasteful number, since it uses less digits than its factorization.

71093661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39651.

The product of its (nonzero) digits is 6804, while the sum is 33.

The square root of 71093661 is about 8431.7056993232. The cubic root of 71093661 is about 414.2637762178.

The spelling of 71093661 in words is "seventy-one million, ninety-three thousand, six hundred sixty-one".