72546823 has 4 divisors (see below), whose sum is σ = 72641448. Its totient is φ = 72452200.

The previous prime is 72546821. The next prime is 72546841. The reversal of 72546823 is 32864527.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32864527 = 73 ⋅450199.

It is a cyclic number.

It is not a de Polignac number, because 72546823 - 2¹ = 72546821 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 (72546821) 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 3 ways as a sum of consecutive naturals, for example, 46153 + ... + 47698.

It is an arithmetic number, because the mean of its divisors is an integer number (18160362).

Almost surely, 2^72546823 is an apocalyptic number.

72546823 is a deficient number, since it is larger than the sum of its proper divisors (94625).

72546823 is an equidigital number, since it uses as much as digits as its factorization.

72546823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94624.

The product of its digits is 80640, while the sum is 37.

The square root of 72546823 is about 8517.4422804032. The cubic root of 72546823 is about 417.0672926116.

The spelling of 72546823 in words is "seventy-two million, five hundred forty-six thousand, eight hundred twenty-three".