8379123509 has 2 divisors, whose sum is σ = 8379123510. Its totient is φ = 8379123508.

The previous prime is 8379123479. The next prime is 8379123521. The reversal of 8379123509 is 9053219738.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6872907409 + 1506216100 = 82903^2 + 38810^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8379123509 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8379123569) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4189561754 + 4189561755.

It is an arithmetic number, because the mean of its divisors is an integer number (4189561755).

Almost surely, 2^8379123509 is an apocalyptic number.

It is an amenable number.

8379123509 is a deficient number, since it is larger than the sum of its proper divisors (1).

8379123509 is an equidigital number, since it uses as much as digits as its factorization.

8379123509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 408240, while the sum is 47.

The square root of 8379123509 is about 91537.5524525317. The cubic root of 8379123509 is about 2031.1072856905.

The spelling of 8379123509 in words is "eight billion, three hundred seventy-nine million, one hundred twenty-three thousand, five hundred nine".