72873197 has 2 divisors, whose sum is σ = 72873198. Its totient is φ = 72873196.

The previous prime is 72873179. The next prime is 72873211. The reversal of 72873197 is 79137827.

Together with previous prime (72873179) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 69538921 + 3334276 = 8339^2 + 1826^2 .

It is an emirp because it is prime and its reverse (79137827) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 72873197 - 2⁸ = 72872941 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72873127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36436598 + 36436599.

It is an arithmetic number, because the mean of its divisors is an integer number (36436599).

Almost surely, 2^72873197 is an apocalyptic number.

It is an amenable number.

72873197 is a deficient number, since it is larger than the sum of its proper divisors (1).

72873197 is an equidigital number, since it uses as much as digits as its factorization.

72873197 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 148176, while the sum is 44.

The square root of 72873197 is about 8536.5799357822. The cubic root of 72873197 is about 417.6917918335.

The spelling of 72873197 in words is "seventy-two million, eight hundred seventy-three thousand, one hundred ninety-seven".