72424342439 has 2 divisors, whose sum is σ = 72424342440. Its totient is φ = 72424342438.

The previous prime is 72424342427. The next prime is 72424342493. The reversal of 72424342439 is 93424342427.

Together with next prime (72424342493) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 72424342439 - 2³² = 68129375143 is a prime.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 72424342439.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72424342409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36212171219 + 36212171220.

It is an arithmetic number, because the mean of its divisors is an integer number (36212171220).

Almost surely, 2^72424342439 is an apocalyptic number.

72424342439 is a deficient number, since it is larger than the sum of its proper divisors (1).

72424342439 is an equidigital number, since it uses as much as digits as its factorization.

72424342439 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1161216, while the sum is 44.

The spelling of 72424342439 in words is "seventy-two billion, four hundred twenty-four million, three hundred forty-two thousand, four hundred thirty-nine".