164404633 has 2 divisors, whose sum is σ = 164404634. Its totient is φ = 164404632.

The previous prime is 164404631. The next prime is 164404649. The reversal of 164404633 is 336404461.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 109244304 + 55160329 = 10452^2 + 7427^2 .

It is a cyclic number.

It is not a de Polignac number, because 164404633 - 2¹ = 164404631 is a prime.

It is a super-3 number, since 3×164404633³ (a number of 26 digits) contains 333 as substring.

Together with 164404631, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 164404595 and 164404604.

It is not a weakly prime, because it can be changed into another prime (164404631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82202316 + 82202317.

It is an arithmetic number, because the mean of its divisors is an integer number (82202317).

Almost surely, 2^164404633 is an apocalyptic number.

It is an amenable number.

164404633 is a deficient number, since it is larger than the sum of its proper divisors (1).

164404633 is an equidigital number, since it uses as much as digits as its factorization.

164404633 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20736, while the sum is 31.

The square root of 164404633 is about 12822.0370066538. The cubic root of 164404633 is about 547.8201687179.

The spelling of 164404633 in words is "one hundred sixty-four million, four hundred four thousand, six hundred thirty-three".