164426939 has 2 divisors, whose sum is σ = 164426940. Its totient is φ = 164426938.

The previous prime is 164426921. The next prime is 164426947. The reversal of 164426939 is 939624461.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 164426939 - 2⁸ = 164426683 is a prime.

It is a super-3 number, since 3×164426939³ (a number of 26 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 164426939.

It is not a weakly prime, because it can be changed into another prime (164420939) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82213469 + 82213470.

It is an arithmetic number, because the mean of its divisors is an integer number (82213470).

Almost surely, 2^164426939 is an apocalyptic number.

164426939 is a deficient number, since it is larger than the sum of its proper divisors (1).

164426939 is an equidigital number, since it uses as much as digits as its factorization.

164426939 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 279936, while the sum is 44.

The square root of 164426939 is about 12822.9068077406. The cubic root of 164426939 is about 547.8449432105.

The spelling of 164426939 in words is "one hundred sixty-four million, four hundred twenty-six thousand, nine hundred thirty-nine".