164621003 has 4 divisors (see below), whose sum is σ = 164650440. Its totient is φ = 164591568.

The previous prime is 164620993. The next prime is 164621057. The reversal of 164621003 is 300126461.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 300126461 = 227 ⋅1322143.

It is a cyclic number.

It is not a de Polignac number, because 164621003 - 2⁴ = 164620987 is a prime.

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 164621003.

It is not an unprimeable number, because it can be changed into a prime (164621063) 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, 3458 + ... + 18471.

It is an arithmetic number, because the mean of its divisors is an integer number (41162610).

Almost surely, 2^164621003 is an apocalyptic number.

164621003 is a deficient number, since it is larger than the sum of its proper divisors (29437).

164621003 is an equidigital number, since it uses as much as digits as its factorization.

164621003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29436.

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 164621003 is about 12830.4716592961. The cubic root of 164621003 is about 548.0603888109.

Adding to 164621003 its reverse (300126461), we get a palindrome (464747464).

The spelling of 164621003 in words is "one hundred sixty-four million, six hundred twenty-one thousand, three".