164340257 has 2 divisors, whose sum is σ = 164340258. Its totient is φ = 164340256.

The previous prime is 164340251. The next prime is 164340271. The reversal of 164340257 is 752043461.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 159997201 + 4343056 = 12649^2 + 2084^2 .

It is a cyclic number.

It is not a de Polignac number, because 164340257 - 2¹⁰ = 164339233 is a prime.

It is not a weakly prime, because it can be changed into another prime (164340251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82170128 + 82170129.

It is an arithmetic number, because the mean of its divisors is an integer number (82170129).

Almost surely, 2^164340257 is an apocalyptic number.

It is an amenable number.

164340257 is a deficient number, since it is larger than the sum of its proper divisors (1).

164340257 is an equidigital number, since it uses as much as digits as its factorization.

164340257 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20160, while the sum is 32.

The square root of 164340257 is about 12819.5263953081. The cubic root of 164340257 is about 547.7486559821.

It can be divided in two parts, 1643 and 40257, that multiplied together give a triangular number (66142251 = T₁₁₅₀₁).

The spelling of 164340257 in words is "one hundred sixty-four million, three hundred forty thousand, two hundred fifty-seven".