43109953 has 2 divisors, whose sum is σ = 43109954. Its totient is φ = 43109952.

The previous prime is 43109947. The next prime is 43109987. The reversal of 43109953 is 35990134.

It is an a-pointer prime, because the next prime (43109987) can be obtained adding 43109953 to its sum of digits (34).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 28912129 + 14197824 = 5377^2 + 3768^2 .

It is a cyclic number.

It is not a de Polignac number, because 43109953 - 2⁹ = 43109441 is a prime.

It is equal to p_2610799 and since 43109953 and 2610799 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (43109903) 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, 21554976 + 21554977.

It is an arithmetic number, because the mean of its divisors is an integer number (21554977).

Almost surely, 2^43109953 is an apocalyptic number.

It is an amenable number.

43109953 is a deficient number, since it is larger than the sum of its proper divisors (1).

43109953 is an equidigital number, since it uses as much as digits as its factorization.

43109953 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 14580, while the sum is 34.

The square root of 43109953 is about 6565.8170093295. The cubic root of 43109953 is about 350.6381636046.

The spelling of 43109953 in words is "forty-three million, one hundred nine thousand, nine hundred fifty-three".