164823889 has 2 divisors, whose sum is σ = 164823890. Its totient is φ = 164823888.

The previous prime is 164823829. The next prime is 164823913. The reversal of 164823889 is 988328461.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 161493264 + 3330625 = 12708^2 + 1825^2 .

It is an emirp because it is prime and its reverse (988328461) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 164823889 - 2⁷ = 164823761 is a prime.

It is not a weakly prime, because it can be changed into another prime (164823809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82411944 + 82411945.

It is an arithmetic number, because the mean of its divisors is an integer number (82411945).

Almost surely, 2^164823889 is an apocalyptic number.

It is an amenable number.

164823889 is a deficient number, since it is larger than the sum of its proper divisors (1).

164823889 is an equidigital number, since it uses as much as digits as its factorization.

164823889 is an evil number, because the sum of its binary digits is even.

The product of its digits is 663552, while the sum is 49.

The square root of 164823889 is about 12838.3756371279. The cubic root of 164823889 is about 548.2854474391.

The spelling of 164823889 in words is "one hundred sixty-four million, eight hundred twenty-three thousand, eight hundred eighty-nine".