72279297247 has 2 divisors, whose sum is σ = 72279297248. Its totient is φ = 72279297246.

The previous prime is 72279297217. The next prime is 72279297319. The reversal of 72279297247 is 74279297227.

It is a weak prime.

It is an emirp because it is prime and its reverse (74279297227) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72279297247 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 72279297191 and 72279297200.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72279297217) 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, 36139648623 + 36139648624.

It is an arithmetic number, because the mean of its divisors is an integer number (36139648624).

Almost surely, 2^72279297247 is an apocalyptic number.

72279297247 is a deficient number, since it is larger than the sum of its proper divisors (1).

72279297247 is an equidigital number, since it uses as much as digits as its factorization.

72279297247 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12446784, while the sum is 58.

The spelling of 72279297247 in words is "seventy-two billion, two hundred seventy-nine million, two hundred ninety-seven thousand, two hundred forty-seven".