2165139967 has 2 divisors, whose sum is σ = 2165139968. Its totient is φ = 2165139966.

The previous prime is 2165139953. The next prime is 2165140049. The reversal of 2165139967 is 7699315612.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2165139967 is a prime.

It is a super-2 number, since 2×2165139967² = 9375662153401522178, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2165139967.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2165139667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1082569983 + 1082569984.

It is an arithmetic number, because the mean of its divisors is an integer number (1082569984).

Almost surely, 2^2165139967 is an apocalyptic number.

2165139967 is a deficient number, since it is larger than the sum of its proper divisors (1).

2165139967 is an equidigital number, since it uses as much as digits as its factorization.

2165139967 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 612360, while the sum is 49.

The square root of 2165139967 is about 46531.0645375753. The cubic root of 2165139967 is about 1293.6853465260.

The spelling of 2165139967 in words is "two billion, one hundred sixty-five million, one hundred thirty-nine thousand, nine hundred sixty-seven".