72875321 has 2 divisors, whose sum is σ = 72875322. Its totient is φ = 72875320.

The previous prime is 72875303. The next prime is 72875351. The reversal of 72875321 is 12357827.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 48511225 + 24364096 = 6965^2 + 4936^2 .

It is a cyclic number.

It is not a de Polignac number, because 72875321 - 2¹⁴ = 72858937 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (72875351) 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, 36437660 + 36437661.

It is an arithmetic number, because the mean of its divisors is an integer number (36437661).

Almost surely, 2^72875321 is an apocalyptic number.

It is an amenable number.

72875321 is a deficient number, since it is larger than the sum of its proper divisors (1).

72875321 is an equidigital number, since it uses as much as digits as its factorization.

72875321 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 23520, while the sum is 35.

The square root of 72875321 is about 8536.7043406692. The cubic root of 72875321 is about 417.6958498813.

The spelling of 72875321 in words is "seventy-two million, eight hundred seventy-five thousand, three hundred twenty-one".