164432399 has 2 divisors, whose sum is σ = 164432400. Its totient is φ = 164432398.

The previous prime is 164432371. The next prime is 164432419. The reversal of 164432399 is 993234461.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-164432399 is a prime.

It is a super-3 number, since 3×164432399³ (a number of 26 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (164432299) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82216199 + 82216200.

It is an arithmetic number, because the mean of its divisors is an integer number (82216200).

Almost surely, 2^164432399 is an apocalyptic number.

164432399 is a deficient number, since it is larger than the sum of its proper divisors (1).

164432399 is an equidigital number, since it uses as much as digits as its factorization.

164432399 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 139968, while the sum is 41.

The square root of 164432399 is about 12823.1197062181. The cubic root of 164432399 is about 547.8510070999.

It can be divided in two parts, 1644 and 32399, that added together give a palindrome (34043).

The spelling of 164432399 in words is "one hundred sixty-four million, four hundred thirty-two thousand, three hundred ninety-nine".