162217949 has 2 divisors, whose sum is σ = 162217950. Its totient is φ = 162217948.

The previous prime is 162217943. The next prime is 162217987. The reversal of 162217949 is 949712261.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 98505625 + 63712324 = 9925^2 + 7982^2 .

It is a cyclic number.

It is not a de Polignac number, because 162217949 - 2⁴ = 162217933 is a prime.

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 (162217943) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81108974 + 81108975.

It is an arithmetic number, because the mean of its divisors is an integer number (81108975).

Almost surely, 2^162217949 is an apocalyptic number.

It is an amenable number.

162217949 is a deficient number, since it is larger than the sum of its proper divisors (1).

162217949 is an equidigital number, since it uses as much as digits as its factorization.

162217949 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 54432, while the sum is 41.

The square root of 162217949 is about 12736.4810289185. The cubic root of 162217949 is about 545.3805371971.

The spelling of 162217949 in words is "one hundred sixty-two million, two hundred seventeen thousand, nine hundred forty-nine".