8161913 has 2 divisors, whose sum is σ = 8161914. Its totient is φ = 8161912.

The previous prime is 8161903. The next prime is 8161931. The reversal of 8161913 is 3191618.

It is a happy number.

Together with next prime (8161931) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4787344 + 3374569 = 2188^2 + 1837^2 .

It is a cyclic number.

It is not a de Polignac number, because 8161913 - 2¹² = 8157817 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (8161903) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4080956 + 4080957.

It is an arithmetic number, because the mean of its divisors is an integer number (4080957).

Almost surely, 2^8161913 is an apocalyptic number.

It is an amenable number.

8161913 is a deficient number, since it is larger than the sum of its proper divisors (1).

8161913 is an equidigital number, since it uses as much as digits as its factorization.

8161913 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 8161913 is about 2856.9061937698. The cubic root of 8161913 is about 201.3402732746.

The spelling of 8161913 in words is "eight million, one hundred sixty-one thousand, nine hundred thirteen".