164725439 has 2 divisors, whose sum is σ = 164725440. Its totient is φ = 164725438.

The previous prime is 164725433. The next prime is 164725541. The reversal of 164725439 is 934527461.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 164725439 - 2¹⁶ = 164659903 is a prime.

It is a super-3 number, since 3×164725439³ (a number of 26 digits) contains 333 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 164725396 and 164725405.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (164725433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82362719 + 82362720.

It is an arithmetic number, because the mean of its divisors is an integer number (82362720).

Almost surely, 2^164725439 is an apocalyptic number.

164725439 is a deficient number, since it is larger than the sum of its proper divisors (1).

164725439 is an equidigital number, since it uses as much as digits as its factorization.

164725439 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 181440, while the sum is 41.

The square root of 164725439 is about 12834.5408566103. The cubic root of 164725439 is about 548.1762612982.

The spelling of 164725439 in words is "one hundred sixty-four million, seven hundred twenty-five thousand, four hundred thirty-nine".