1664352229 has 2 divisors, whose sum is σ = 1664352230. Its totient is φ = 1664352228.

The previous prime is 1664352103. The next prime is 1664352233. The reversal of 1664352229 is 9222534661.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1532722500 + 131629729 = 39150^2 + 11473^2 .

It is a cyclic number.

It is not a de Polignac number, because 1664352229 - 2²⁹ = 1127481317 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1664352191 and 1664352200.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1664355229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 832176114 + 832176115.

It is an arithmetic number, because the mean of its divisors is an integer number (832176115).

Almost surely, 2^1664352229 is an apocalyptic number.

It is an amenable number.

1664352229 is a deficient number, since it is larger than the sum of its proper divisors (1).

1664352229 is an equidigital number, since it uses as much as digits as its factorization.

1664352229 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 155520, while the sum is 40.

The square root of 1664352229 is about 40796.4732421811. The cubic root of 1664352229 is about 1185.0820334054.

The spelling of 1664352229 in words is "one billion, six hundred sixty-four million, three hundred fifty-two thousand, two hundred twenty-nine".