164225639 has 2 divisors, whose sum is σ = 164225640. Its totient is φ = 164225638.

The previous prime is 164225617. The next prime is 164225657. The reversal of 164225639 is 936522461.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 164225639 - 2¹² = 164221543 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 (164225609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82112819 + 82112820.

It is an arithmetic number, because the mean of its divisors is an integer number (82112820).

Almost surely, 2^164225639 is an apocalyptic number.

164225639 is a deficient number, since it is larger than the sum of its proper divisors (1).

164225639 is an equidigital number, since it uses as much as digits as its factorization.

164225639 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 77760, while the sum is 38.

The square root of 164225639 is about 12815.0551696042. The cubic root of 164225639 is about 547.6212851685.

The spelling of 164225639 in words is "one hundred sixty-four million, two hundred twenty-five thousand, six hundred thirty-nine".