164542249 has 2 divisors, whose sum is σ = 164542250. Its totient is φ = 164542248.

The previous prime is 164542247. The next prime is 164542267. The reversal of 164542249 is 942245461.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 100861849 + 63680400 = 10043^2 + 7980^2 .

It is a cyclic number.

It is not a de Polignac number, because 164542249 - 2¹ = 164542247 is a prime.

Together with 164542247, 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 (164542243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82271124 + 82271125.

It is an arithmetic number, because the mean of its divisors is an integer number (82271125).

Almost surely, 2^164542249 is an apocalyptic number.

It is an amenable number.

164542249 is a deficient number, since it is larger than the sum of its proper divisors (1).

164542249 is an equidigital number, since it uses as much as digits as its factorization.

164542249 is an evil number, because the sum of its binary digits is even.

The product of its digits is 69120, while the sum is 37.

The square root of 164542249 is about 12827.4022701403. The cubic root of 164542249 is about 547.9729782705.

The spelling of 164542249 in words is "one hundred sixty-four million, five hundred forty-two thousand, two hundred forty-nine".