162191189 has 2 divisors, whose sum is σ = 162191190. Its totient is φ = 162191188.

The previous prime is 162191167. The next prime is 162191207. The reversal of 162191189 is 981191261.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 159012100 + 3179089 = 12610^2 + 1783^2 .

It is a cyclic number.

It is not a de Polignac number, because 162191189 - 2¹⁶ = 162125653 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 (162191089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81095594 + 81095595.

It is an arithmetic number, because the mean of its divisors is an integer number (81095595).

Almost surely, 2^162191189 is an apocalyptic number.

It is an amenable number.

162191189 is a deficient number, since it is larger than the sum of its proper divisors (1).

162191189 is an equidigital number, since it uses as much as digits as its factorization.

162191189 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7776, while the sum is 38.

The square root of 162191189 is about 12735.4304599413. The cubic root of 162191189 is about 545.3505462994.

The spelling of 162191189 in words is "one hundred sixty-two million, one hundred ninety-one thousand, one hundred eighty-nine".