8453172109 has 2 divisors, whose sum is σ = 8453172110. Its totient is φ = 8453172108.

The previous prime is 8453172059. The next prime is 8453172113. The reversal of 8453172109 is 9012713548.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5536848100 + 2916324009 = 74410^2 + 54003^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8453172109 is a prime.

It is a super-2 number, since 2×8453172109² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8453172149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4226586054 + 4226586055.

It is an arithmetic number, because the mean of its divisors is an integer number (4226586055).

Almost surely, 2^8453172109 is an apocalyptic number.

It is an amenable number.

8453172109 is a deficient number, since it is larger than the sum of its proper divisors (1).

8453172109 is an equidigital number, since it uses as much as digits as its factorization.

8453172109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 60480, while the sum is 40.

The square root of 8453172109 is about 91941.1339336208. The cubic root of 8453172109 is about 2037.0728965076.

The spelling of 8453172109 in words is "eight billion, four hundred fifty-three million, one hundred seventy-two thousand, one hundred nine".