162782161 has 2 divisors, whose sum is σ = 162782162. Its totient is φ = 162782160.

The previous prime is 162782149. The next prime is 162782227. The reversal of 162782161 is 161287261.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 159542161 + 3240000 = 12631^2 + 1800^2 .

It is an emirp because it is prime and its reverse (161287261) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 162782161 - 2¹⁵ = 162749393 is a prime.

It is equal to p_9121579 and since 162782161 and 9121579 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (162782111) 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, 81391080 + 81391081.

It is an arithmetic number, because the mean of its divisors is an integer number (81391081).

Almost surely, 2^162782161 is an apocalyptic number.

It is an amenable number.

162782161 is a deficient number, since it is larger than the sum of its proper divisors (1).

162782161 is an equidigital number, since it uses as much as digits as its factorization.

162782161 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8064, while the sum is 34.

The square root of 162782161 is about 12758.6112488781. The cubic root of 162782161 is about 546.0121035213.

The spelling of 162782161 in words is "one hundred sixty-two million, seven hundred eighty-two thousand, one hundred sixty-one".