164808491 has 2 divisors, whose sum is σ = 164808492. Its totient is φ = 164808490.

The previous prime is 164808481. The next prime is 164808517. The reversal of 164808491 is 194808461.

It is a weak prime.

It is an emirp because it is prime and its reverse (194808461) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 164808491 - 2²² = 160614187 is a prime.

It is not a weakly prime, because it can be changed into another prime (164808401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82404245 + 82404246.

It is an arithmetic number, because the mean of its divisors is an integer number (82404246).

Almost surely, 2^164808491 is an apocalyptic number.

164808491 is a deficient number, since it is larger than the sum of its proper divisors (1).

164808491 is an equidigital number, since it uses as much as digits as its factorization.

164808491 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 55296, while the sum is 41.

The square root of 164808491 is about 12837.7759366644. The cubic root of 164808491 is about 548.2683731297.

The spelling of 164808491 in words is "one hundred sixty-four million, eight hundred eight thousand, four hundred ninety-one".