943664069 has 4 divisors (see below), whose sum is σ = 944037696. Its totient is φ = 943290444.

The previous prime is 943664047. The next prime is 943664107. The reversal of 943664069 is 960466349.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 960466349 = 4073 ⋅235813.

It is a cyclic number.

It is not a de Polignac number, because 943664069 - 2¹⁶ = 943598533 is a prime.

It is a super-2 number, since 2×943664069² = 1781003750243273522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (943664039) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 182999 + ... + 188084.

It is an arithmetic number, because the mean of its divisors is an integer number (236009424).

Almost surely, 2^943664069 is an apocalyptic number.

It is an amenable number.

943664069 is a deficient number, since it is larger than the sum of its proper divisors (373627).

943664069 is a wasteful number, since it uses less digits than its factorization.

943664069 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 373626.

The product of its (nonzero) digits is 839808, while the sum is 47.

The square root of 943664069 is about 30719.1156936524. The cubic root of 943664069 is about 980.8572496986.

The spelling of 943664069 in words is "nine hundred forty-three million, six hundred sixty-four thousand, sixty-nine".