72244709 has 2 divisors, whose sum is σ = 72244710. Its totient is φ = 72244708.

The previous prime is 72244703. The next prime is 72244759. The reversal of 72244709 is 90744227.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 53728900 + 18515809 = 7330^2 + 4303^2 .

It is a cyclic number.

It is not a de Polignac number, because 72244709 - 2²⁰ = 71196133 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72244703) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36122354 + 36122355.

It is an arithmetic number, because the mean of its divisors is an integer number (36122355).

Almost surely, 2^72244709 is an apocalyptic number.

It is an amenable number.

72244709 is a deficient number, since it is larger than the sum of its proper divisors (1).

72244709 is an equidigital number, since it uses as much as digits as its factorization.

72244709 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 28224, while the sum is 35.

The square root of 72244709 is about 8499.6887590076. The cubic root of 72244709 is about 416.4875420633.

The spelling of 72244709 in words is "seventy-two million, two hundred forty-four thousand, seven hundred nine".