72823943 has 2 divisors, whose sum is σ = 72823944. Its totient is φ = 72823942.

The previous prime is 72823939. The next prime is 72823967. The reversal of 72823943 is 34932827.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 72823943 - 2² = 72823939 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 72823897 and 72823906.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72823973) 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, 36411971 + 36411972.

It is an arithmetic number, because the mean of its divisors is an integer number (36411972).

Almost surely, 2^72823943 is an apocalyptic number.

72823943 is a deficient number, since it is larger than the sum of its proper divisors (1).

72823943 is an equidigital number, since it uses as much as digits as its factorization.

72823943 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 72576, while the sum is 38.

The square root of 72823943 is about 8533.6945691769. The cubic root of 72823943 is about 417.5976665625.

The spelling of 72823943 in words is "seventy-two million, eight hundred twenty-three thousand, nine hundred forty-three".