43331669 has 2 divisors, whose sum is σ = 43331670. Its totient is φ = 43331668.

The previous prime is 43331641. The next prime is 43331671. The reversal of 43331669 is 96613334.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28408900 + 14922769 = 5330^2 + 3863^2 .

It is a cyclic number.

It is not a de Polignac number, because 43331669 - 2²⁰ = 42283093 is a prime.

It is a super-2 number, since 2×43331669² = 3755267076651122, which contains 22 as substring.

Together with 43331671, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43331689) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21665834 + 21665835.

It is an arithmetic number, because the mean of its divisors is an integer number (21665835).

Almost surely, 2^43331669 is an apocalyptic number.

It is an amenable number.

43331669 is a deficient number, since it is larger than the sum of its proper divisors (1).

43331669 is an equidigital number, since it uses as much as digits as its factorization.

43331669 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 34992, while the sum is 35.

The square root of 43331669 is about 6582.6794696385. The cubic root of 43331669 is about 351.2382508112.

The spelling of 43331669 in words is "forty-three million, three hundred thirty-one thousand, six hundred sixty-nine".