164144243 has 2 divisors, whose sum is σ = 164144244. Its totient is φ = 164144242.

The previous prime is 164144219. The next prime is 164144251. The reversal of 164144243 is 342441461.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 164144243 - 2¹² = 164140147 is a prime.

It is not a weakly prime, because it can be changed into another prime (164144293) 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, 82072121 + 82072122.

It is an arithmetic number, because the mean of its divisors is an integer number (82072122).

Almost surely, 2^164144243 is an apocalyptic number.

164144243 is a deficient number, since it is larger than the sum of its proper divisors (1).

164144243 is an equidigital number, since it uses as much as digits as its factorization.

164144243 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9216, while the sum is 29.

The square root of 164144243 is about 12811.8789800716. The cubic root of 164144243 is about 547.5307967637.

The spelling of 164144243 in words is "one hundred sixty-four million, one hundred forty-four thousand, two hundred forty-three".