164406287 has 4 divisors (see below), whose sum is σ = 164481576. Its totient is φ = 164331000.

The previous prime is 164406271. The next prime is 164406301. The reversal of 164406287 is 782604461.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 782604461 = 151 ⋅5182811.

It is a cyclic number.

It is not a de Polignac number, because 164406287 - 2⁴ = 164406271 is a prime.

It is a super-3 number, since 3×164406287³ (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 164406287.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (164406217) 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, 34268 + ... + 38769.

It is an arithmetic number, because the mean of its divisors is an integer number (41120394).

Almost surely, 2^164406287 is an apocalyptic number.

164406287 is a deficient number, since it is larger than the sum of its proper divisors (75289).

164406287 is an equidigital number, since it uses as much as digits as its factorization.

164406287 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75288.

The product of its (nonzero) digits is 64512, while the sum is 38.

The square root of 164406287 is about 12822.1015048236. The cubic root of 164406287 is about 547.8220058347.

The spelling of 164406287 in words is "one hundred sixty-four million, four hundred six thousand, two hundred eighty-seven".