72735389 has 2 divisors, whose sum is σ = 72735390. Its totient is φ = 72735388.

The previous prime is 72735349. The next prime is 72735413. The reversal of 72735389 is 98353727.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 64080025 + 8655364 = 8005^2 + 2942^2 .

It is a cyclic number.

It is not a de Polignac number, because 72735389 - 2¹² = 72731293 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72735329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36367694 + 36367695.

It is an arithmetic number, because the mean of its divisors is an integer number (36367695).

Almost surely, 2^72735389 is an apocalyptic number.

It is an amenable number.

72735389 is a deficient number, since it is larger than the sum of its proper divisors (1).

72735389 is an equidigital number, since it uses as much as digits as its factorization.

72735389 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 317520, while the sum is 44.

The square root of 72735389 is about 8528.5044996177. The cubic root of 72735389 is about 417.4283314895.

The spelling of 72735389 in words is "seventy-two million, seven hundred thirty-five thousand, three hundred eighty-nine".