72229369 has 2 divisors, whose sum is σ = 72229370. Its totient is φ = 72229368.

The previous prime is 72229363. The next prime is 72229397. The reversal of 72229369 is 96392227.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 64192144 + 8037225 = 8012^2 + 2835^2 .

It is a cyclic number.

It is not a de Polignac number, because 72229369 - 2⁹ = 72228857 is a prime.

It is a super-2 number, since 2×72229369² = 10434163492276322, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (72229363) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36114684 + 36114685.

It is an arithmetic number, because the mean of its divisors is an integer number (36114685).

Almost surely, 2^72229369 is an apocalyptic number.

It is an amenable number.

72229369 is a deficient number, since it is larger than the sum of its proper divisors (1).

72229369 is an equidigital number, since it uses as much as digits as its factorization.

72229369 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 81648, while the sum is 40.

The square root of 72229369 is about 8498.7863251173. The cubic root of 72229369 is about 416.4580618369.

It can be divided in two parts, 72 and 229369, that added together give a square (229441 = 479²).

The spelling of 72229369 in words is "seventy-two million, two hundred twenty-nine thousand, three hundred sixty-nine".