164309543 has 4 divisors (see below), whose sum is σ = 165817080. Its totient is φ = 162802008.

The previous prime is 164309531. The next prime is 164309557. The reversal of 164309543 is 345903461.

It is a happy number.

164309543 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 345903461 = 4421 ⋅78241.

It is a cyclic number.

It is not a de Polignac number, because 164309543 - 2⁶ = 164309479 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (164306543) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 753605 + ... + 753822.

It is an arithmetic number, because the mean of its divisors is an integer number (41454270).

Almost surely, 2^164309543 is an apocalyptic number.

164309543 is a deficient number, since it is larger than the sum of its proper divisors (1507537).

164309543 is a wasteful number, since it uses less digits than its factorization.

164309543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1507536.

The product of its (nonzero) digits is 38880, while the sum is 35.

The square root of 164309543 is about 12818.3284011606. The cubic root of 164309543 is about 547.7145304414.

The spelling of 164309543 in words is "one hundred sixty-four million, three hundred nine thousand, five hundred forty-three".