72897823 has 2 divisors, whose sum is σ = 72897824. Its totient is φ = 72897822.

The previous prime is 72897791. The next prime is 72897827. The reversal of 72897823 is 32879827.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 72897823 - 2⁵ = 72897791 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72897827) 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 as a sum of consecutive naturals, namely, 36448911 + 36448912.

It is an arithmetic number, because the mean of its divisors is an integer number (36448912).

Almost surely, 2^72897823 is an apocalyptic number.

72897823 is a deficient number, since it is larger than the sum of its proper divisors (1).

72897823 is an equidigital number, since it uses as much as digits as its factorization.

72897823 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 338688, while the sum is 46.

The square root of 72897823 is about 8538.0221948646. The cubic root of 72897823 is about 417.7388366550.

The spelling of 72897823 in words is "seventy-two million, eight hundred ninety-seven thousand, eight hundred twenty-three".