164721527 has 2 divisors, whose sum is σ = 164721528. Its totient is φ = 164721526.

The previous prime is 164721523. The next prime is 164721553. The reversal of 164721527 is 725127461.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 164721527 - 2² = 164721523 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (164721523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82360763 + 82360764.

It is an arithmetic number, because the mean of its divisors is an integer number (82360764).

Almost surely, 2^164721527 is an apocalyptic number.

164721527 is a deficient number, since it is larger than the sum of its proper divisors (1).

164721527 is an equidigital number, since it uses as much as digits as its factorization.

164721527 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 23520, while the sum is 35.

The square root of 164721527 is about 12834.3884544609. The cubic root of 164721527 is about 548.1719217893.

Adding to 164721527 its reverse (725127461), we get a palindrome (889848988).

The spelling of 164721527 in words is "one hundred sixty-four million, seven hundred twenty-one thousand, five hundred twenty-seven".