72384709 has 2 divisors, whose sum is σ = 72384710. Its totient is φ = 72384708.

The previous prime is 72384673. The next prime is 72384743. The reversal of 72384709 is 90748327.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 53436100 + 18948609 = 7310^2 + 4353^2 .

It is a cyclic number.

It is not a de Polignac number, because 72384709 - 2⁷ = 72384581 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72384779) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36192354 + 36192355.

It is an arithmetic number, because the mean of its divisors is an integer number (36192355).

Almost surely, 2^72384709 is an apocalyptic number.

It is an amenable number.

72384709 is a deficient number, since it is larger than the sum of its proper divisors (1).

72384709 is an equidigital number, since it uses as much as digits as its factorization.

72384709 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 84672, while the sum is 40.

The square root of 72384709 is about 8507.9203686918. The cubic root of 72384709 is about 416.7563997315.

The spelling of 72384709 in words is "seventy-two million, three hundred eighty-four thousand, seven hundred nine".