164243587 has 2 divisors, whose sum is σ = 164243588. Its totient is φ = 164243586.

The previous prime is 164243567. The next prime is 164243591. The reversal of 164243587 is 785342461.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 164243587 - 2⁷ = 164243459 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (164243507) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82121793 + 82121794.

It is an arithmetic number, because the mean of its divisors is an integer number (82121794).

Almost surely, 2^164243587 is an apocalyptic number.

164243587 is a deficient number, since it is larger than the sum of its proper divisors (1).

164243587 is an equidigital number, since it uses as much as digits as its factorization.

164243587 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 161280, while the sum is 40.

The square root of 164243587 is about 12815.7554205751. The cubic root of 164243587 is about 547.6412340406.

The spelling of 164243587 in words is "one hundred sixty-four million, two hundred forty-three thousand, five hundred eighty-seven".