72937643 has 2 divisors, whose sum is σ = 72937644. Its totient is φ = 72937642.

The previous prime is 72937603. The next prime is 72937649. The reversal of 72937643 is 34673927.

It is a strong prime.

It is an emirp because it is prime and its reverse (34673927) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 72937643 - 2⁸ = 72937387 is a prime.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 72937643.

It is not a weakly prime, because it can be changed into another prime (72937649) 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, 36468821 + 36468822.

It is an arithmetic number, because the mean of its divisors is an integer number (36468822).

Almost surely, 2^72937643 is an apocalyptic number.

72937643 is a deficient number, since it is larger than the sum of its proper divisors (1).

72937643 is an equidigital number, since it uses as much as digits as its factorization.

72937643 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 190512, while the sum is 41.

The square root of 72937643 is about 8540.3537982920. The cubic root of 72937643 is about 417.8148852570.

The spelling of 72937643 in words is "seventy-two million, nine hundred thirty-seven thousand, six hundred forty-three".