164040403 has 2 divisors, whose sum is σ = 164040404. Its totient is φ = 164040402.

The previous prime is 164040391. The next prime is 164040421. The reversal of 164040403 is 304040461.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-164040403 is a prime.

It is not a weakly prime, because it can be changed into another prime (164340403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82020201 + 82020202.

It is an arithmetic number, because the mean of its divisors is an integer number (82020202).

Almost surely, 2^164040403 is an apocalyptic number.

164040403 is a deficient number, since it is larger than the sum of its proper divisors (1).

164040403 is an equidigital number, since it uses as much as digits as its factorization.

164040403 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1152, while the sum is 22.

The square root of 164040403 is about 12807.8258498466. The cubic root of 164040403 is about 547.4153137991.

Adding to 164040403 its reverse (304040461), we get a palindrome (468080864).

The spelling of 164040403 in words is "one hundred sixty-four million, forty thousand, four hundred three".