164634623 has 2 divisors, whose sum is σ = 164634624. Its totient is φ = 164634622.

The previous prime is 164634619. The next prime is 164634629. The reversal of 164634623 is 326436461.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 164634623 - 2² = 164634619 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (164634629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82317311 + 82317312.

It is an arithmetic number, because the mean of its divisors is an integer number (82317312).

Almost surely, 2^164634623 is an apocalyptic number.

164634623 is a deficient number, since it is larger than the sum of its proper divisors (1).

164634623 is an equidigital number, since it uses as much as digits as its factorization.

164634623 is an evil number, because the sum of its binary digits is even.

The product of its digits is 62208, while the sum is 35.

The square root of 164634623 is about 12831.0024160235. The cubic root of 164634623 is about 548.0755030764.

The spelling of 164634623 in words is "one hundred sixty-four million, six hundred thirty-four thousand, six hundred twenty-three".