72989823 has 8 divisors (see below), whose sum is σ = 103044528. Its totient is φ = 45797504.

The previous prime is 72989809. The next prime is 72989831. The reversal of 72989823 is 32898927.

It is a happy number.

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 72989823 - 2⁹ = 72989311 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72989843) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 715536 + ... + 715637.

It is an arithmetic number, because the mean of its divisors is an integer number (12880566).

Almost surely, 2^72989823 is an apocalyptic number.

72989823 is a deficient number, since it is larger than the sum of its proper divisors (30054705).

72989823 is a wasteful number, since it uses less digits than its factorization.

72989823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1431193.

The product of its digits is 435456, while the sum is 48.

The square root of 72989823 is about 8543.4081606815. The cubic root of 72989823 is about 417.9144972127.

The spelling of 72989823 in words is "seventy-two million, nine hundred eighty-nine thousand, eight hundred twenty-three".