9173621285249 has 2 divisors, whose sum is σ = 9173621285250. Its totient is φ = 9173621285248.

The previous prime is 9173621285239. The next prime is 9173621285267. The reversal of 9173621285249 is 9425821263719.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8575175155600 + 598446129649 = 2928340^2 + 773593^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9173621285249 is a prime.

It is not a weakly prime, because it can be changed into another prime (9173621285239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4586810642624 + 4586810642625.

It is an arithmetic number, because the mean of its divisors is an integer number (4586810642625).

Almost surely, 2^{9173621285249} is an apocalyptic number.

It is an amenable number.

9173621285249 is a deficient number, since it is larger than the sum of its proper divisors (1).

9173621285249 is an equidigital number, since it uses as much as digits as its factorization.

9173621285249 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13063680, while the sum is 59.

The spelling of 9173621285249 in words is "nine trillion, one hundred seventy-three billion, six hundred twenty-one million, two hundred eighty-five thousand, two hundred forty-nine".