43538969 has 2 divisors, whose sum is σ = 43538970. Its totient is φ = 43538968.

The previous prime is 43538959. The next prime is 43538987. The reversal of 43538969 is 96983534.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 43494025 + 44944 = 6595^2 + 212^2 .

It is a cyclic number.

It is not a de Polignac number, because 43538969 - 2⁴ = 43538953 is a prime.

It is a super-2 number, since 2×43538969² = 3791283643165922, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (43538909) 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, 21769484 + 21769485.

It is an arithmetic number, because the mean of its divisors is an integer number (21769485).

Almost surely, 2^43538969 is an apocalyptic number.

It is an amenable number.

43538969 is a deficient number, since it is larger than the sum of its proper divisors (1).

43538969 is an equidigital number, since it uses as much as digits as its factorization.

43538969 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 699840, while the sum is 47.

The square root of 43538969 is about 6598.4065500695. The cubic root of 43538969 is about 351.7974714120.

The spelling of 43538969 in words is "forty-three million, five hundred thirty-eight thousand, nine hundred sixty-nine".