72446489 has 2 divisors, whose sum is σ = 72446490. Its totient is φ = 72446488.

The previous prime is 72446477. The next prime is 72446533. The reversal of 72446489 is 98464427.

It is an a-pointer prime, because the next prime (72446533) can be obtained adding 72446489 to its sum of digits (44).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 47844889 + 24601600 = 6917^2 + 4960^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72446489 is a prime.

It is not a weakly prime, because it can be changed into another prime (72446419) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36223244 + 36223245.

It is an arithmetic number, because the mean of its divisors is an integer number (36223245).

Almost surely, 2^72446489 is an apocalyptic number.

It is an amenable number.

72446489 is a deficient number, since it is larger than the sum of its proper divisors (1).

72446489 is an equidigital number, since it uses as much as digits as its factorization.

72446489 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 387072, while the sum is 44.

The square root of 72446489 is about 8511.5503288179. The cubic root of 72446489 is about 416.8749325412.

The spelling of 72446489 in words is "seventy-two million, four hundred forty-six thousand, four hundred eighty-nine".