8172992249 has 2 divisors, whose sum is σ = 8172992250. Its totient is φ = 8172992248.

The previous prime is 8172992239. The next prime is 8172992263. The reversal of 8172992249 is 9422992718.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6566185024 + 1606807225 = 81032^2 + 40085^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8172992249 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 8172992249.

It is not a weakly prime, because it can be changed into another prime (8172992239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4086496124 + 4086496125.

It is an arithmetic number, because the mean of its divisors is an integer number (4086496125).

Almost surely, 2^8172992249 is an apocalyptic number.

It is an amenable number.

8172992249 is a deficient number, since it is larger than the sum of its proper divisors (1).

8172992249 is an equidigital number, since it uses as much as digits as its factorization.

8172992249 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1306368, while the sum is 53.

The square root of 8172992249 is about 90404.6030299343. The cubic root of 8172992249 is about 2014.3133405250.

The spelling of 8172992249 in words is "eight billion, one hundred seventy-two million, nine hundred ninety-two thousand, two hundred forty-nine".