164406533 has 4 divisors (see below), whose sum is σ = 164432460. Its totient is φ = 164380608.

The previous prime is 164406523. The next prime is 164406551. The reversal of 164406533 is 335604461.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 34492129 + 129914404 = 5873^2 + 11398^2 .

It is a cyclic number.

It is not a de Polignac number, because 164406533 - 2⁶ = 164406469 is a prime.

It is a super-3 number, since 3×164406533³ (a number of 26 digits) contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 164406533.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (164406523) 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, 3623 + ... + 18491.

It is an arithmetic number, because the mean of its divisors is an integer number (41108115).

Almost surely, 2^164406533 is an apocalyptic number.

It is an amenable number.

164406533 is a deficient number, since it is larger than the sum of its proper divisors (25927).

164406533 is a wasteful number, since it uses less digits than its factorization.

164406533 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25926.

The product of its (nonzero) digits is 25920, while the sum is 32.

The square root of 164406533 is about 12822.1110976313. Note that the first 3 decimals coincide. The cubic root of 164406533 is about 547.8222790687.

The spelling of 164406533 in words is "one hundred sixty-four million, four hundred six thousand, five hundred thirty-three".