164244439 has 2 divisors, whose sum is σ = 164244440. Its totient is φ = 164244438.

The previous prime is 164244433. The next prime is 164244491. The reversal of 164244439 is 934442461.

It is a weak prime.

It is an emirp because it is prime and its reverse (934442461) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 164244439 - 2⁵ = 164244407 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 164244398 and 164244407.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (164244433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82122219 + 82122220.

It is an arithmetic number, because the mean of its divisors is an integer number (82122220).

Almost surely, 2^164244439 is an apocalyptic number.

164244439 is a deficient number, since it is larger than the sum of its proper divisors (1).

164244439 is an equidigital number, since it uses as much as digits as its factorization.

164244439 is an evil number, because the sum of its binary digits is even.

The product of its digits is 82944, while the sum is 37.

The square root of 164244439 is about 12815.7886608667. The cubic root of 164244439 is about 547.6421809868.

The spelling of 164244439 in words is "one hundred sixty-four million, two hundred forty-four thousand, four hundred thirty-nine".