164909237 has 2 divisors, whose sum is σ = 164909238. Its totient is φ = 164909236.

The previous prime is 164909233. The next prime is 164909267. The reversal of 164909237 is 732909461.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 164891281 + 17956 = 12841^2 + 134^2 .

It is a cyclic number.

It is not a de Polignac number, because 164909237 - 2² = 164909233 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 164909194 and 164909203.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (164909233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82454618 + 82454619.

It is an arithmetic number, because the mean of its divisors is an integer number (82454619).

Almost surely, 2^164909237 is an apocalyptic number.

It is an amenable number.

164909237 is a deficient number, since it is larger than the sum of its proper divisors (1).

164909237 is an equidigital number, since it uses as much as digits as its factorization.

164909237 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 81648, while the sum is 41.

The square root of 164909237 is about 12841.6991476985. The cubic root of 164909237 is about 548.3800676060.

The spelling of 164909237 in words is "one hundred sixty-four million, nine hundred nine thousand, two hundred thirty-seven".