72448993 has 2 divisors, whose sum is σ = 72448994. Its totient is φ = 72448992.

The previous prime is 72448969. The next prime is 72449021. The reversal of 72448993 is 39984427.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 51955264 + 20493729 = 7208^2 + 4527^2 .

It is a cyclic number.

It is not a de Polignac number, because 72448993 - 2²⁵ = 38894561 is a prime.

It is not a weakly prime, because it can be changed into another prime (72448903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36224496 + 36224497.

It is an arithmetic number, because the mean of its divisors is an integer number (36224497).

Almost surely, 2^72448993 is an apocalyptic number.

It is an amenable number.

72448993 is a deficient number, since it is larger than the sum of its proper divisors (1).

72448993 is an equidigital number, since it uses as much as digits as its factorization.

72448993 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 72448993 is about 8511.6974217837. The cubic root of 72448993 is about 416.8797353634.

It can be divided in two parts, 72448 and 993, that added together give a square (73441 = 271²).

The spelling of 72448993 in words is "seventy-two million, four hundred forty-eight thousand, nine hundred ninety-three".