43668953 has 2 divisors, whose sum is σ = 43668954. Its totient is φ = 43668952.

The previous prime is 43668943. The next prime is 43669001. The reversal of 43668953 is 35986634.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 43072969 + 595984 = 6563^2 + 772^2 .

It is a cyclic number.

It is not a de Polignac number, because 43668953 - 2²⁴ = 26891737 is a prime.

It is a super-2 number, since 2×43668953² = 3813954912232418, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (43668913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21834476 + 21834477.

It is an arithmetic number, because the mean of its divisors is an integer number (21834477).

Almost surely, 2^43668953 is an apocalyptic number.

It is an amenable number.

43668953 is a deficient number, since it is larger than the sum of its proper divisors (1).

43668953 is an equidigital number, since it uses as much as digits as its factorization.

43668953 is an evil number, because the sum of its binary digits is even.

The product of its digits is 466560, while the sum is 44.

The square root of 43668953 is about 6608.2488603260. The cubic root of 43668953 is about 352.1472164215.

The spelling of 43668953 in words is "forty-three million, six hundred sixty-eight thousand, nine hundred fifty-three".