72448399 has 2 divisors, whose sum is σ = 72448400. Its totient is φ = 72448398.

The previous prime is 72448319. The next prime is 72448417. The reversal of 72448399 is 99384427.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (99384427) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 72448399 - 2¹¹ = 72446351 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72448319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36224199 + 36224200.

It is an arithmetic number, because the mean of its divisors is an integer number (36224200).

Almost surely, 2^72448399 is an apocalyptic number.

72448399 is a deficient number, since it is larger than the sum of its proper divisors (1).

72448399 is an equidigital number, since it uses as much as digits as its factorization.

72448399 is an evil number, because the sum of its binary digits is even.

The product of its digits is 435456, while the sum is 46.

The square root of 72448399 is about 8511.6625285546. The cubic root of 72448399 is about 416.8785960458.

The spelling of 72448399 in words is "seventy-two million, four hundred forty-eight thousand, three hundred ninety-nine".