8161319 has 2 divisors, whose sum is σ = 8161320. Its totient is φ = 8161318.

The previous prime is 8161273. The next prime is 8161333. The reversal of 8161319 is 9131618.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 8161319 - 2⁸ = 8161063 is a prime.

It is a super-2 number, since 2×8161319² = 133214255639522, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 8161291 and 8161300.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8161519) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4080659 + 4080660.

It is an arithmetic number, because the mean of its divisors is an integer number (4080660).

Almost surely, 2^8161319 is an apocalyptic number.

8161319 is a deficient number, since it is larger than the sum of its proper divisors (1).

8161319 is an equidigital number, since it uses as much as digits as its factorization.

8161319 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1296, while the sum is 29.

The square root of 8161319 is about 2856.8022332671. The cubic root of 8161319 is about 201.3353888387.

Subtracting 8161319 from its reverse (9131618), we obtain a cube (970299 = 99³).

The spelling of 8161319 in words is "eight million, one hundred sixty-one thousand, three hundred nineteen".