43047749 has 4 divisors (see below), whose sum is σ = 45313440. Its totient is φ = 40782060.

The previous prime is 43047737. The next prime is 43047821. The reversal of 43047749 is 94774034.

It is a happy number.

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: 94774034 = 2 ⋅47387017.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-43047749 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 (43047149) 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, 1132817 + ... + 1132854.

It is an arithmetic number, because the mean of its divisors is an integer number (11328360).

Almost surely, 2^43047749 is an apocalyptic number.

It is an amenable number.

43047749 is a deficient number, since it is larger than the sum of its proper divisors (2265691).

43047749 is a wasteful number, since it uses less digits than its factorization.

43047749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2265690.

The product of its (nonzero) digits is 84672, while the sum is 38.

The square root of 43047749 is about 6561.0783412485. The cubic root of 43047749 is about 350.4694353972.

The spelling of 43047749 in words is "forty-three million, forty-seven thousand, seven hundred forty-nine".