72444313 has 2 divisors, whose sum is σ = 72444314. Its totient is φ = 72444312.

The previous prime is 72444301. The next prime is 72444331. The reversal of 72444313 is 31344427.

Together with next prime (72444331) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 49519369 + 22924944 = 7037^2 + 4788^2 .

It is a cyclic number.

It is not a de Polignac number, because 72444313 - 2⁹ = 72443801 is a prime.

It is not a weakly prime, because it can be changed into another prime (72444013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36222156 + 36222157.

It is an arithmetic number, because the mean of its divisors is an integer number (36222157).

Almost surely, 2^72444313 is an apocalyptic number.

It is an amenable number.

72444313 is a deficient number, since it is larger than the sum of its proper divisors (1).

72444313 is an equidigital number, since it uses as much as digits as its factorization.

72444313 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8064, while the sum is 28.

The square root of 72444313 is about 8511.4225015564. The cubic root of 72444313 is about 416.8707587529.

The spelling of 72444313 in words is "seventy-two million, four hundred forty-four thousand, three hundred thirteen".