164217403 has 8 divisors (see below), whose sum is σ = 188220672. Its totient is φ = 140350056.

The previous prime is 164217397. The next prime is 164217419. The reversal of 164217403 is 304712461.

164217403 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-164217403 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (164217103) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31375 + ... + 36232.

It is an arithmetic number, because the mean of its divisors is an integer number (23527584).

Almost surely, 2^164217403 is an apocalyptic number.

164217403 is a deficient number, since it is larger than the sum of its proper divisors (24003269).

164217403 is an equidigital number, since it uses as much as digits as its factorization.

164217403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67961.

The product of its (nonzero) digits is 4032, while the sum is 28.

The square root of 164217403 is about 12814.7338247815. The cubic root of 164217403 is about 547.6121305194.

Adding to 164217403 its reverse (304712461), we get a palindrome (468929864).

The spelling of 164217403 in words is "one hundred sixty-four million, two hundred seventeen thousand, four hundred three".