164220239 has 2 divisors, whose sum is σ = 164220240. Its totient is φ = 164220238.

The previous prime is 164220229. The next prime is 164220269. The reversal of 164220239 is 932022461.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 164220239 - 2²⁰ = 163171663 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (164220229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82110119 + 82110120.

It is an arithmetic number, because the mean of its divisors is an integer number (82110120).

Almost surely, 2^164220239 is an apocalyptic number.

164220239 is a deficient number, since it is larger than the sum of its proper divisors (1).

164220239 is an equidigital number, since it uses as much as digits as its factorization.

164220239 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5184, while the sum is 29.

The square root of 164220239 is about 12814.8444781823. The cubic root of 164220239 is about 547.6152828834.

The spelling of 164220239 in words is "one hundred sixty-four million, two hundred twenty thousand, two hundred thirty-nine".