164211647 has 2 divisors, whose sum is σ = 164211648. Its totient is φ = 164211646.

The previous prime is 164211631. The next prime is 164211667. The reversal of 164211647 is 746112461.

It is a weak prime.

It is an emirp because it is prime and its reverse (746112461) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 164211647 - 2⁴ = 164211631 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (164211617) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82105823 + 82105824.

It is an arithmetic number, because the mean of its divisors is an integer number (82105824).

Almost surely, 2^164211647 is an apocalyptic number.

164211647 is a deficient number, since it is larger than the sum of its proper divisors (1).

164211647 is an equidigital number, since it uses as much as digits as its factorization.

164211647 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8064, while the sum is 32.

The square root of 164211647 is about 12814.5092375791. The cubic root of 164211647 is about 547.6057323095.

The spelling of 164211647 in words is "one hundred sixty-four million, two hundred eleven thousand, six hundred forty-seven".