72946823 has 4 divisors (see below), whose sum is σ = 76118448. Its totient is φ = 69775200.

The previous prime is 72946807. The next prime is 72946829. The reversal of 72946823 is 32864927.

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 72946823 - 2⁴ = 72946807 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 (72946829) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1585778 + ... + 1585823.

It is an arithmetic number, because the mean of its divisors is an integer number (19029612).

Almost surely, 2^72946823 is an apocalyptic number.

72946823 is a deficient number, since it is larger than the sum of its proper divisors (3171625).

72946823 is a wasteful number, since it uses less digits than its factorization.

72946823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3171624.

The product of its digits is 145152, while the sum is 41.

The square root of 72946823 is about 8540.8912298425. The cubic root of 72946823 is about 417.8324133791.

The spelling of 72946823 in words is "seventy-two million, nine hundred forty-six thousand, eight hundred twenty-three".