43136969 has 2 divisors, whose sum is σ = 43136970. Its totient is φ = 43136968.

The previous prime is 43136927. The next prime is 43136971. The reversal of 43136969 is 96963134.

43136969 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25806400 + 17330569 = 5080^2 + 4163^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-43136969 is a prime.

It is a super-2 number, since 2×43136969² = 3721596189013922, which contains 22 as substring.

Together with 43136971, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (43136069) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21568484 + 21568485.

It is an arithmetic number, because the mean of its divisors is an integer number (21568485).

Almost surely, 2^43136969 is an apocalyptic number.

It is an amenable number.

43136969 is a deficient number, since it is larger than the sum of its proper divisors (1).

43136969 is an equidigital number, since it uses as much as digits as its factorization.

43136969 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 104976, while the sum is 41.

The square root of 43136969 is about 6567.8740091448. The cubic root of 43136969 is about 350.7113938902.

The spelling of 43136969 in words is "forty-three million, one hundred thirty-six thousand, nine hundred sixty-nine".