72445873 has 2 divisors, whose sum is σ = 72445874. Its totient is φ = 72445872.

The previous prime is 72445871. The next prime is 72445907. The reversal of 72445873 is 37854427.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 42667024 + 29778849 = 6532^2 + 5457^2 .

It is a cyclic number.

It is not a de Polignac number, because 72445873 - 2¹ = 72445871 is a prime.

Together with 72445871, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (72445871) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36222936 + 36222937.

It is an arithmetic number, because the mean of its divisors is an integer number (36222937).

Almost surely, 2^72445873 is an apocalyptic number.

It is an amenable number.

72445873 is a deficient number, since it is larger than the sum of its proper divisors (1).

72445873 is an equidigital number, since it uses as much as digits as its factorization.

72445873 is an evil number, because the sum of its binary digits is even.

The product of its digits is 188160, while the sum is 40.

The square root of 72445873 is about 8511.5141426188. The cubic root of 72445873 is about 416.8737509993.

The spelling of 72445873 in words is "seventy-two million, four hundred forty-five thousand, eight hundred seventy-three".