43361749 has 4 divisors (see below), whose sum is σ = 43627936. Its totient is φ = 43095564.

The previous prime is 43361719. The next prime is 43361753. The reversal of 43361749 is 94716334.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 94716334 = 2 ⋅47358167.

It is a cyclic number.

It is not a de Polignac number, because 43361749 - 2¹⁹ = 42837461 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43361719) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 132849 + ... + 133174.

It is an arithmetic number, because the mean of its divisors is an integer number (10906984).

Almost surely, 2^43361749 is an apocalyptic number.

It is an amenable number.

43361749 is a deficient number, since it is larger than the sum of its proper divisors (266187).

43361749 is a wasteful number, since it uses less digits than its factorization.

43361749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 266186.

The product of its digits is 54432, while the sum is 37.

The square root of 43361749 is about 6584.9638571521. The cubic root of 43361749 is about 351.3195062612.

The spelling of 43361749 in words is "forty-three million, three hundred sixty-one thousand, seven hundred forty-nine".