164343651 has 4 divisors (see below), whose sum is σ = 219124872. Its totient is φ = 109562432.

The previous prime is 164343649. The next prime is 164343653. The reversal of 164343651 is 156343461.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 156343461 = 3 ⋅52114487.

It is an interprime number because it is at equal distance from previous prime (164343649) and next prime (164343653).

It is a cyclic number.

It is not a de Polignac number, because 164343651 - 2¹ = 164343649 is a prime.

It is not an unprimeable number, because it can be changed into a prime (164343653) 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 in 3 ways as a sum of consecutive naturals, for example, 27390606 + ... + 27390611.

It is an arithmetic number, because the mean of its divisors is an integer number (54781218).

Almost surely, 2^164343651 is an apocalyptic number.

164343651 is a deficient number, since it is larger than the sum of its proper divisors (54781221).

164343651 is an equidigital number, since it uses as much as digits as its factorization.

164343651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54781220.

The product of its digits is 25920, while the sum is 33.

The square root of 164343651 is about 12819.6587708098. The cubic root of 164343651 is about 547.7524267079.

The spelling of 164343651 in words is "one hundred sixty-four million, three hundred forty-three thousand, six hundred fifty-one".