4043749 has 2 divisors, whose sum is σ = 4043750. Its totient is φ = 4043748.

The previous prime is 4043747. The next prime is 4043759. The reversal of 4043749 is 9473404.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2873025 + 1170724 = 1695^2 + 1082^2 .

It is a cyclic number.

It is not a de Polignac number, because 4043749 - 2¹ = 4043747 is a prime.

Together with 4043747, it forms a pair of twin primes.

4043749 is a lucky number.

It is equal to p₂₈₆₀₆₉ and since 4043749 and 286069 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 4043749.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4043747) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2021874 + 2021875.

It is an arithmetic number, because the mean of its divisors is an integer number (2021875).

Almost surely, 2^4043749 is an apocalyptic number.

It is an amenable number.

4043749 is a deficient number, since it is larger than the sum of its proper divisors (1).

4043749 is an equidigital number, since it uses as much as digits as its factorization.

4043749 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12096, while the sum is 31.

The square root of 4043749 is about 2010.9075065751. The cubic root of 4043749 is about 159.3167347698.

The spelling of 4043749 in words is "four million, forty-three thousand, seven hundred forty-nine".