164862641 has 2 divisors, whose sum is σ = 164862642. Its totient is φ = 164862640.

The previous prime is 164862631. The next prime is 164862653. The reversal of 164862641 is 146268461.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 148742416 + 16120225 = 12196^2 + 4015^2 .

It is a cyclic number.

It is not a de Polignac number, because 164862641 - 2¹⁴ = 164846257 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 164862595 and 164862604.

It is not a weakly prime, because it can be changed into another prime (164862631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82431320 + 82431321.

It is an arithmetic number, because the mean of its divisors is an integer number (82431321).

Almost surely, 2^164862641 is an apocalyptic number.

It is an amenable number.

164862641 is a deficient number, since it is larger than the sum of its proper divisors (1).

164862641 is an equidigital number, since it uses as much as digits as its factorization.

164862641 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 55296, while the sum is 38.

The square root of 164862641 is about 12839.8847736263. The cubic root of 164862641 is about 548.3284134857.

The spelling of 164862641 in words is "one hundred sixty-four million, eight hundred sixty-two thousand, six hundred forty-one".