72830389 has 2 divisors, whose sum is σ = 72830390. Its totient is φ = 72830388.

The previous prime is 72830383. The next prime is 72830399. The reversal of 72830389 is 98303827.

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., 52200625 + 20629764 = 7225^2 + 4542^2 .

It is a cyclic number.

It is not a de Polignac number, because 72830389 - 2⁵ = 72830357 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72830383) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36415194 + 36415195.

It is an arithmetic number, because the mean of its divisors is an integer number (36415195).

Almost surely, 2^72830389 is an apocalyptic number.

It is an amenable number.

72830389 is a deficient number, since it is larger than the sum of its proper divisors (1).

72830389 is an equidigital number, since it uses as much as digits as its factorization.

72830389 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72576, while the sum is 40.

The square root of 72830389 is about 8534.0722401442. The cubic root of 72830389 is about 417.6099873965.

The spelling of 72830389 in words is "seventy-two million, eight hundred thirty thousand, three hundred eighty-nine".