164539841 has 2 divisors, whose sum is σ = 164539842. Its totient is φ = 164539840.

The previous prime is 164539783. The next prime is 164539871. The reversal of 164539841 is 148935461.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 158659216 + 5880625 = 12596^2 + 2425^2 .

It is a cyclic number.

It is not a de Polignac number, because 164539841 - 2¹⁰ = 164538817 is a prime.

It is not a weakly prime, because it can be changed into another prime (164539871) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82269920 + 82269921.

It is an arithmetic number, because the mean of its divisors is an integer number (82269921).

Almost surely, 2^164539841 is an apocalyptic number.

It is an amenable number.

164539841 is a deficient number, since it is larger than the sum of its proper divisors (1).

164539841 is an equidigital number, since it uses as much as digits as its factorization.

164539841 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 103680, while the sum is 41.

The square root of 164539841 is about 12827.3084082359. The cubic root of 164539841 is about 547.9703051468.

The spelling of 164539841 in words is "one hundred sixty-four million, five hundred thirty-nine thousand, eight hundred forty-one".