162138169 has 2 divisors, whose sum is σ = 162138170. Its totient is φ = 162138168.

The previous prime is 162138157. The next prime is 162138173. The reversal of 162138169 is 961831261.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 94322944 + 67815225 = 9712^2 + 8235^2 .

It is a cyclic number.

It is not a de Polignac number, because 162138169 - 2¹³ = 162129977 is a prime.

It is a super-2 number, since 2×162138169² = 52577571693345122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (162138199) 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, 81069084 + 81069085.

It is an arithmetic number, because the mean of its divisors is an integer number (81069085).

Almost surely, 2^162138169 is an apocalyptic number.

It is an amenable number.

162138169 is a deficient number, since it is larger than the sum of its proper divisors (1).

162138169 is an equidigital number, since it uses as much as digits as its factorization.

162138169 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15552, while the sum is 37.

The square root of 162138169 is about 12733.3486954532. The cubic root of 162138169 is about 545.2911151276.

The spelling of 162138169 in words is "one hundred sixty-two million, one hundred thirty-eight thousand, one hundred sixty-nine".