8172879551 has 2 divisors, whose sum is σ = 8172879552. Its totient is φ = 8172879550.

The previous prime is 8172879503. The next prime is 8172879553. The reversal of 8172879551 is 1559782718.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8172879551 is a prime.

It is a Sophie Germain prime.

Together with 8172879553, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 8172879493 and 8172879502.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8172879553) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4086439775 + 4086439776.

It is an arithmetic number, because the mean of its divisors is an integer number (4086439776).

Almost surely, 2^8172879551 is an apocalyptic number.

8172879551 is a deficient number, since it is larger than the sum of its proper divisors (1).

8172879551 is an equidigital number, since it uses as much as digits as its factorization.

8172879551 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1411200, while the sum is 53.

The square root of 8172879551 is about 90403.9797298769. The cubic root of 8172879551 is about 2014.3040819767.

The spelling of 8172879551 in words is "eight billion, one hundred seventy-two million, eight hundred seventy-nine thousand, five hundred fifty-one".