72294430073 has 2 divisors, whose sum is σ = 72294430074. Its totient is φ = 72294430072.

The previous prime is 72294430037. The next prime is 72294430079. The reversal of 72294430073 is 37003449227.

Together with previous prime (72294430037) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 71851874704 + 442555369 = 268052^2 + 21037^2 .

It is an emirp because it is prime and its reverse (37003449227) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 72294430073 - 2¹⁰ = 72294429049 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 72294430073.

It is not a weakly prime, because it can be changed into another prime (72294430079) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36147215036 + 36147215037.

It is an arithmetic number, because the mean of its divisors is an integer number (36147215037).

Almost surely, 2^72294430073 is an apocalyptic number.

It is an amenable number.

72294430073 is a deficient number, since it is larger than the sum of its proper divisors (1).

72294430073 is an equidigital number, since it uses as much as digits as its factorization.

72294430073 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 254016, while the sum is 41.

The spelling of 72294430073 in words is "seventy-two billion, two hundred ninety-four million, four hundred thirty thousand, seventy-three".