164883809 has 2 divisors, whose sum is σ = 164883810. Its totient is φ = 164883808.

The previous prime is 164883787. The next prime is 164883811. The reversal of 164883809 is 908388461.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 155550784 + 9333025 = 12472^2 + 3055^2 .

It is a cyclic number.

It is not a de Polignac number, because 164883809 - 2⁸ = 164883553 is a prime.

Together with 164883811, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (164883889) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82441904 + 82441905.

It is an arithmetic number, because the mean of its divisors is an integer number (82441905).

Almost surely, 2^164883809 is an apocalyptic number.

It is an amenable number.

164883809 is a deficient number, since it is larger than the sum of its proper divisors (1).

164883809 is an equidigital number, since it uses as much as digits as its factorization.

164883809 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 331776, while the sum is 47.

The square root of 164883809 is about 12840.7090536310. The cubic root of 164883809 is about 548.3518805349.

The spelling of 164883809 in words is "one hundred sixty-four million, eight hundred eighty-three thousand, eight hundred nine".