164421683 has 2 divisors, whose sum is σ = 164421684. Its totient is φ = 164421682.

The previous prime is 164421617. The next prime is 164421689. The reversal of 164421683 is 386124461.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 164421683 - 2¹² = 164417587 is a prime.

It is a super-3 number, since 3×164421683³ (a number of 26 digits) contains 333 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (164421689) 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, 82210841 + 82210842.

It is an arithmetic number, because the mean of its divisors is an integer number (82210842).

Almost surely, 2^164421683 is an apocalyptic number.

164421683 is a deficient number, since it is larger than the sum of its proper divisors (1).

164421683 is an equidigital number, since it uses as much as digits as its factorization.

164421683 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 27648, while the sum is 35.

The square root of 164421683 is about 12822.7018603725. The cubic root of 164421683 is about 547.8391057573.

The spelling of 164421683 in words is "one hundred sixty-four million, four hundred twenty-one thousand, six hundred eighty-three".