164507839 has 2 divisors, whose sum is σ = 164507840. Its totient is φ = 164507838.

The previous prime is 164507831. The next prime is 164507843. The reversal of 164507839 is 938705461.

It is a strong prime.

It is an emirp because it is prime and its reverse (938705461) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 164507839 - 2³ = 164507831 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 164507795 and 164507804.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (164507831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82253919 + 82253920.

It is an arithmetic number, because the mean of its divisors is an integer number (82253920).

Almost surely, 2^164507839 is an apocalyptic number.

164507839 is a deficient number, since it is larger than the sum of its proper divisors (1).

164507839 is an equidigital number, since it uses as much as digits as its factorization.

164507839 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 181440, while the sum is 43.

The square root of 164507839 is about 12826.0609307768. The cubic root of 164507839 is about 547.9347772110.

The spelling of 164507839 in words is "one hundred sixty-four million, five hundred seven thousand, eight hundred thirty-nine".