43061749 has 2 divisors, whose sum is σ = 43061750. Its totient is φ = 43061748.

The previous prime is 43061743. The next prime is 43061797. The reversal of 43061749 is 94716034.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 41692849 + 1368900 = 6457^2 + 1170^2 .

It is a cyclic number.

It is not a de Polignac number, because 43061749 - 2³ = 43061741 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43061741) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21530874 + 21530875.

It is an arithmetic number, because the mean of its divisors is an integer number (21530875).

Almost surely, 2^43061749 is an apocalyptic number.

It is an amenable number.

43061749 is a deficient number, since it is larger than the sum of its proper divisors (1).

43061749 is an equidigital number, since it uses as much as digits as its factorization.

43061749 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18144, while the sum is 34.

The square root of 43061749 is about 6562.1451523111. The cubic root of 43061749 is about 350.5074245325.

The spelling of 43061749 in words is "forty-three million, sixty-one thousand, seven hundred forty-nine".