164590919 has 2 divisors, whose sum is σ = 164590920. Its totient is φ = 164590918.

The previous prime is 164590897. The next prime is 164590949. The reversal of 164590919 is 919095461.

It is a weak prime.

It is an emirp because it is prime and its reverse (919095461) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 164590919 - 2²⁰ = 163542343 is a prime.

It is a super-2 number, since 2×164590919² = 54180341234529122, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 164590919.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (164590949) 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, 82295459 + 82295460.

It is an arithmetic number, because the mean of its divisors is an integer number (82295460).

Almost surely, 2^164590919 is an apocalyptic number.

164590919 is a deficient number, since it is larger than the sum of its proper divisors (1).

164590919 is an equidigital number, since it uses as much as digits as its factorization.

164590919 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 87480, while the sum is 44.

The square root of 164590919 is about 12829.2992404106. The cubic root of 164590919 is about 548.0270013069.

The spelling of 164590919 in words is "one hundred sixty-four million, five hundred ninety thousand, nine hundred nineteen".