162143921 has 2 divisors, whose sum is σ = 162143922. Its totient is φ = 162143920.

The previous prime is 162143881. The next prime is 162143923. The reversal of 162143921 is 129341261.

162143921 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 146143921 + 16000000 = 12089^2 + 4000^2 .

It is a cyclic number.

It is not a de Polignac number, because 162143921 - 2¹⁸ = 161881777 is a prime.

It is a super-2 number, since 2×162143921² = 52581302234508482, which contains 22 as substring.

Together with 162143923, 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 (162143923) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81071960 + 81071961.

It is an arithmetic number, because the mean of its divisors is an integer number (81071961).

Almost surely, 2^162143921 is an apocalyptic number.

It is an amenable number.

162143921 is a deficient number, since it is larger than the sum of its proper divisors (1).

162143921 is an equidigital number, since it uses as much as digits as its factorization.

162143921 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2592, while the sum is 29.

The square root of 162143921 is about 12733.5745570519. The cubic root of 162143921 is about 545.2975632852.

The spelling of 162143921 in words is "one hundred sixty-two million, one hundred forty-three thousand, nine hundred twenty-one".