72989071 has 4 divisors (see below), whose sum is σ = 73029600. Its totient is φ = 72948544.

The previous prime is 72989053. The next prime is 72989083. The reversal of 72989071 is 17098927.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 72989071 - 2¹¹ = 72987023 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 (72989171) 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, 17431 + ... + 21208.

It is an arithmetic number, because the mean of its divisors is an integer number (18257400).

Almost surely, 2^72989071 is an apocalyptic number.

72989071 is a deficient number, since it is larger than the sum of its proper divisors (40529).

72989071 is a wasteful number, since it uses less digits than its factorization.

72989071 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40528.

The product of its (nonzero) digits is 63504, while the sum is 43.

The square root of 72989071 is about 8543.3641500290. The cubic root of 72989071 is about 417.9130619771.

The spelling of 72989071 in words is "seventy-two million, nine hundred eighty-nine thousand, seventy-one".