162540869 has 2 divisors, whose sum is σ = 162540870. Its totient is φ = 162540868.

The previous prime is 162540743. The next prime is 162540881. The reversal of 162540869 is 968045261.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 141729025 + 20811844 = 11905^2 + 4562^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-162540869 is a prime.

It is a super-2 number, since 2×162540869² = 52839068190550322, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (162440869) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81270434 + 81270435.

It is an arithmetic number, because the mean of its divisors is an integer number (81270435).

Almost surely, 2^162540869 is an apocalyptic number.

It is an amenable number.

162540869 is a deficient number, since it is larger than the sum of its proper divisors (1).

162540869 is an equidigital number, since it uses as much as digits as its factorization.

162540869 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 103680, while the sum is 41.

The square root of 162540869 is about 12749.1516972699. The cubic root of 162540869 is about 545.7421855274.

The spelling of 162540869 in words is "one hundred sixty-two million, five hundred forty thousand, eight hundred sixty-nine".