72440933 has 2 divisors, whose sum is σ = 72440934. Its totient is φ = 72440932.

The previous prime is 72440909. The next prime is 72441001. The reversal of 72440933 is 33904427.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 60730849 + 11710084 = 7793^2 + 3422^2 .

It is an emirp because it is prime and its reverse (33904427) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 72440933 - 2¹⁴ = 72424549 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 72440933.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72440903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36220466 + 36220467.

It is an arithmetic number, because the mean of its divisors is an integer number (36220467).

Almost surely, 2^72440933 is an apocalyptic number.

It is an amenable number.

72440933 is a deficient number, since it is larger than the sum of its proper divisors (1).

72440933 is an equidigital number, since it uses as much as digits as its factorization.

72440933 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18144, while the sum is 32.

The square root of 72440933 is about 8511.2239425361. The cubic root of 72440933 is about 416.8642754048.

The spelling of 72440933 in words is "seventy-two million, four hundred forty thousand, nine hundred thirty-three".