164003427 has 16 divisors (see below), whose sum is σ = 277678080. Its totient is φ = 93716136.

The previous prime is 164003407. The next prime is 164003443. The reversal of 164003427 is 724300461.

It is not a de Polignac number, because 164003427 - 2¹¹ = 164001379 is a prime.

It is a super-4 number, since 4×164003427⁴ (a number of 34 digits) contains 4444 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 164003427.

It is not an unprimeable number, because it can be changed into a prime (164003407) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 433683 + ... + 434060.

It is an arithmetic number, because the mean of its divisors is an integer number (17354880).

Almost surely, 2^164003427 is an apocalyptic number.

164003427 is a deficient number, since it is larger than the sum of its proper divisors (113674653).

164003427 is an equidigital number, since it uses as much as digits as its factorization.

164003427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 867759 (or 867753 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 27.

The square root of 164003427 is about 12806.3822760372. The cubic root of 164003427 is about 547.3741801327.

Adding to 164003427 its reverse (724300461), we get a palindrome (888303888).

The spelling of 164003427 in words is "one hundred sixty-four million, three thousand, four hundred twenty-seven".