43144693 has 2 divisors, whose sum is σ = 43144694. Its totient is φ = 43144692.

The previous prime is 43144681. The next prime is 43144697. The reversal of 43144693 is 39644134.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 35784324 + 7360369 = 5982^2 + 2713^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-43144693 is a prime.

It is a super-2 number, since 2×43144693² = 3722929068128498, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43144697) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21572346 + 21572347.

It is an arithmetic number, because the mean of its divisors is an integer number (21572347).

Almost surely, 2^43144693 is an apocalyptic number.

It is an amenable number.

43144693 is a deficient number, since it is larger than the sum of its proper divisors (1).

43144693 is an equidigital number, since it uses as much as digits as its factorization.

43144693 is an evil number, because the sum of its binary digits is even.

The product of its digits is 31104, while the sum is 34.

The square root of 43144693 is about 6568.4619965407. The cubic root of 43144693 is about 350.7323251486.

The spelling of 43144693 in words is "forty-three million, one hundred forty-four thousand, six hundred ninety-three".