162873881 has 2 divisors, whose sum is σ = 162873882. Its totient is φ = 162873880.

The previous prime is 162873863. The next prime is 162873883. The reversal of 162873881 is 188378261.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 161696656 + 1177225 = 12716^2 + 1085^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-162873881 is a prime.

It is a super-2 number, since 2×162873881² = 53055802224004322, which contains 22 as substring.

Together with 162873883, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (162873883) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81436940 + 81436941.

It is an arithmetic number, because the mean of its divisors is an integer number (81436941).

Almost surely, 2^162873881 is an apocalyptic number.

It is an amenable number.

162873881 is a deficient number, since it is larger than the sum of its proper divisors (1).

162873881 is an equidigital number, since it uses as much as digits as its factorization.

162873881 is an evil number, because the sum of its binary digits is even.

The product of its digits is 129024, while the sum is 44.

The square root of 162873881 is about 12762.2051777896. The cubic root of 162873881 is about 546.1146348773.

The spelling of 162873881 in words is "one hundred sixty-two million, eight hundred seventy-three thousand, eight hundred eighty-one".