164769643 has 2 divisors, whose sum is σ = 164769644. Its totient is φ = 164769642.

The previous prime is 164769623. The next prime is 164769659. The reversal of 164769643 is 346967461.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 164769643 - 2⁹ = 164769131 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 164769593 and 164769602.

It is not a weakly prime, because it can be changed into another prime (164769613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82384821 + 82384822.

It is an arithmetic number, because the mean of its divisors is an integer number (82384822).

Almost surely, 2^164769643 is an apocalyptic number.

164769643 is a deficient number, since it is larger than the sum of its proper divisors (1).

164769643 is an equidigital number, since it uses as much as digits as its factorization.

164769643 is an evil number, because the sum of its binary digits is even.

The product of its digits is 653184, while the sum is 46.

The square root of 164769643 is about 12836.2628128284. The cubic root of 164769643 is about 548.2252911999.

The spelling of 164769643 in words is "one hundred sixty-four million, seven hundred sixty-nine thousand, six hundred forty-three".