72044017 has 2 divisors, whose sum is σ = 72044018. Its totient is φ = 72044016.

The previous prime is 72044009. The next prime is 72044023. The reversal of 72044017 is 71044027.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 42981136 + 29062881 = 6556^2 + 5391^2 .

It is an emirp because it is prime and its reverse (71044027) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 72044017 - 2³ = 72044009 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 72043982 and 72044000.

It is not a weakly prime, because it can be changed into another prime (72044047) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36022008 + 36022009.

It is an arithmetic number, because the mean of its divisors is an integer number (36022009).

Almost surely, 2^72044017 is an apocalyptic number.

It is an amenable number.

72044017 is a deficient number, since it is larger than the sum of its proper divisors (1).

72044017 is an equidigital number, since it uses as much as digits as its factorization.

72044017 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1568, while the sum is 25.

The square root of 72044017 is about 8487.8747045418. The cubic root of 72044017 is about 416.1015242380.

The spelling of 72044017 in words is "seventy-two million, forty-four thousand, seventeen".