72000289 has 2 divisors, whose sum is σ = 72000290. Its totient is φ = 72000288.

The previous prime is 72000283. The next prime is 72000343. The reversal of 72000289 is 98200027.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 40449600 + 31550689 = 6360^2 + 5617^2 .

It is an emirp because it is prime and its reverse (98200027) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 72000289 - 2⁷ = 72000161 is a prime.

It is not a weakly prime, because it can be changed into another prime (72000283) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36000144 + 36000145.

It is an arithmetic number, because the mean of its divisors is an integer number (36000145).

Almost surely, 2^72000289 is an apocalyptic number.

It is an amenable number.

72000289 is a deficient number, since it is larger than the sum of its proper divisors (1).

72000289 is an equidigital number, since it uses as much as digits as its factorization.

72000289 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2016, while the sum is 28.

The square root of 72000289 is about 8485.2984037098. The cubic root of 72000289 is about 416.0173212247.

The spelling of 72000289 in words is "seventy-two million, two hundred eighty-nine", and thus it is an aban number.