8172137579 has 2 divisors, whose sum is σ = 8172137580. Its totient is φ = 8172137578.

The previous prime is 8172137569. The next prime is 8172137581. The reversal of 8172137579 is 9757312718.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 8172137579 - 2²⁴ = 8155360363 is a prime.

It is a super-2 number, since 2×8172137579² (a number of 21 digits) contains 22 as substring.

It is a Sophie Germain prime.

Together with 8172137581, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (8172137539) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4086068789 + 4086068790.

It is an arithmetic number, because the mean of its divisors is an integer number (4086068790).

Almost surely, 2^8172137579 is an apocalyptic number.

8172137579 is a deficient number, since it is larger than the sum of its proper divisors (1).

8172137579 is an equidigital number, since it uses as much as digits as its factorization.

8172137579 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 740880, while the sum is 50.

The square root of 8172137579 is about 90399.8759899592. The cubic root of 8172137579 is about 2014.2431241691.

The spelling of 8172137579 in words is "eight billion, one hundred seventy-two million, one hundred thirty-seven thousand, five hundred seventy-nine".