164374643 has 4 divisors (see below), whose sum is σ = 173025960. Its totient is φ = 155723328.

The previous prime is 164374631. The next prime is 164374663. The reversal of 164374643 is 346473461.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 164374643 - 2⁴ = 164374627 is a prime.

It is a super-2 number, since 2×164374643² = 54038046522754898, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 164374597 and 164374606.

It is not an unprimeable number, because it can be changed into a prime (164374663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4325630 + ... + 4325667.

It is an arithmetic number, because the mean of its divisors is an integer number (43256490).

Almost surely, 2^164374643 is an apocalyptic number.

164374643 is a deficient number, since it is larger than the sum of its proper divisors (8651317).

164374643 is an equidigital number, since it uses as much as digits as its factorization.

164374643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8651316.

The product of its digits is 145152, while the sum is 38.

The square root of 164374643 is about 12820.8674823508. The cubic root of 164374643 is about 547.7868563438.

The spelling of 164374643 in words is "one hundred sixty-four million, three hundred seventy-four thousand, six hundred forty-three".