164443453 has 4 divisors (see below), whose sum is σ = 166071708. Its totient is φ = 162815200.

The previous prime is 164443417. The next prime is 164443463. The reversal of 164443453 is 354344461.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 354344461 = 101 ⋅3508361.

It can be written as a sum of positive squares in 2 ways, for example, as 119311929 + 45131524 = 10923^2 + 6718^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-164443453 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 (164443463) 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, 813976 + ... + 814177.

It is an arithmetic number, because the mean of its divisors is an integer number (41517927).

Almost surely, 2^164443453 is an apocalyptic number.

It is an amenable number.

164443453 is a deficient number, since it is larger than the sum of its proper divisors (1628255).

164443453 is a wasteful number, since it uses less digits than its factorization.

164443453 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1628254.

The product of its digits is 69120, while the sum is 34.

The square root of 164443453 is about 12823.5507173325. The cubic root of 164443453 is about 547.8632832883.

The spelling of 164443453 in words is "one hundred sixty-four million, four hundred forty-three thousand, four hundred fifty-three".