71989073 has 8 divisors (see below), whose sum is σ = 78086400. Its totient is φ = 65971728.

The previous prime is 71989019. The next prime is 71989079. The reversal of 71989073 is 37098917.

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

It is a cyclic number.

It is not a de Polignac number, because 71989073 - 2²⁴ = 55211857 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71989079) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18113 + ... + 21726.

It is an arithmetic number, because the mean of its divisors is an integer number (9760800).

Almost surely, 2^71989073 is an apocalyptic number.

It is an amenable number.

71989073 is a deficient number, since it is larger than the sum of its proper divisors (6097327).

71989073 is a wasteful number, since it uses less digits than its factorization.

71989073 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39991.

The product of its (nonzero) digits is 95256, while the sum is 44.

The square root of 71989073 is about 8484.6374701575. The cubic root of 71989073 is about 415.9957181050.

The spelling of 71989073 in words is "seventy-one million, nine hundred eighty-nine thousand, seventy-three".