164340403 has 2 divisors, whose sum is σ = 164340404. Its totient is φ = 164340402.

The previous prime is 164340389. The next prime is 164340457. The reversal of 164340403 is 304043461.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 164340403 - 2¹³ = 164332211 is a prime.

It is not a weakly prime, because it can be changed into another prime (164340103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82170201 + 82170202.

It is an arithmetic number, because the mean of its divisors is an integer number (82170202).

Almost surely, 2^164340403 is an apocalyptic number.

164340403 is a deficient number, since it is larger than the sum of its proper divisors (1).

164340403 is an equidigital number, since it uses as much as digits as its factorization.

164340403 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3456, while the sum is 25.

The square root of 164340403 is about 12819.5320897449. The cubic root of 164340403 is about 547.7488181888.

Adding to 164340403 its reverse (304043461), we get a palindrome (468383864).

The spelling of 164340403 in words is "one hundred sixty-four million, three hundred forty thousand, four hundred three".