162791 has 2 divisors, whose sum is σ = 162792. Its totient is φ = 162790.

The previous prime is 162787. The next prime is 162821. The reversal of 162791 is 197261.

It is a weak prime.

It is an emirp because it is prime and its reverse (197261) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 162791 - 2² = 162787 is a prime.

It is a Chen prime.

It is a plaindrome in base 15.

It is a self number, because there is not a number n which added to its sum of digits gives 162791.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (162731) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81395 + 81396.

It is an arithmetic number, because the mean of its divisors is an integer number (81396).

2¹⁶²⁷⁹¹ is an apocalyptic number.

162791 is a deficient number, since it is larger than the sum of its proper divisors (1).

162791 is an equidigital number, since it uses as much as digits as its factorization.

162791 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 756, while the sum is 26.

The square root of 162791 is about 403.4736670466. The cubic root of 162791 is about 54.6021986082.

The spelling of 162791 in words is "one hundred sixty-two thousand, seven hundred ninety-one".