72436393 has 2 divisors, whose sum is σ = 72436394. Its totient is φ = 72436392.

The previous prime is 72436349. The next prime is 72436423. The reversal of 72436393 is 39363427.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 56731024 + 15705369 = 7532^2 + 3963^2 .

It is an emirp because it is prime and its reverse (39363427) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72436393 is a prime.

It is not a weakly prime, because it can be changed into another prime (72436093) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36218196 + 36218197.

It is an arithmetic number, because the mean of its divisors is an integer number (36218197).

Almost surely, 2^72436393 is an apocalyptic number.

It is an amenable number.

72436393 is a deficient number, since it is larger than the sum of its proper divisors (1).

72436393 is an equidigital number, since it uses as much as digits as its factorization.

72436393 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 81648, while the sum is 37.

The square root of 72436393 is about 8510.9572317102. The cubic root of 72436393 is about 416.8555666851.

The spelling of 72436393 in words is "seventy-two million, four hundred thirty-six thousand, three hundred ninety-three".