72344449 has 2 divisors, whose sum is σ = 72344450. Its totient is φ = 72344448.

The previous prime is 72344429. The next prime is 72344477. The reversal of 72344449 is 94444327.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 59954049 + 12390400 = 7743^2 + 3520^2 .

It is a cyclic number.

It is not a de Polignac number, because 72344449 - 2¹⁷ = 72213377 is a prime.

It is a super-2 number, since 2×72344449² = 10467438602227202, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (72344429) 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, 36172224 + 36172225.

It is an arithmetic number, because the mean of its divisors is an integer number (36172225).

Almost surely, 2^72344449 is an apocalyptic number.

It is an amenable number.

72344449 is a deficient number, since it is larger than the sum of its proper divisors (1).

72344449 is an equidigital number, since it uses as much as digits as its factorization.

72344449 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 96768, while the sum is 37.

The square root of 72344449 is about 8505.5540089991. The cubic root of 72344449 is about 416.6791194856.

The spelling of 72344449 in words is "seventy-two million, three hundred forty-four thousand, four hundred forty-nine".