43250749 has 2 divisors, whose sum is σ = 43250750. Its totient is φ = 43250748.

The previous prime is 43250729. The next prime is 43250789. The reversal of 43250749 is 94705234.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 43164900 + 85849 = 6570^2 + 293^2 .

It is a cyclic number.

It is not a de Polignac number, because 43250749 - 2⁷ = 43250621 is a prime.

It is a super-2 number, since 2×43250749² = 3741254578122002, which contains 22 as substring.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43250729) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21625374 + 21625375.

It is an arithmetic number, because the mean of its divisors is an integer number (21625375).

Almost surely, 2^43250749 is an apocalyptic number.

It is an amenable number.

43250749 is a deficient number, since it is larger than the sum of its proper divisors (1).

43250749 is an equidigital number, since it uses as much as digits as its factorization.

43250749 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 30240, while the sum is 34.

The square root of 43250749 is about 6576.5301641519. The cubic root of 43250749 is about 351.0194738697.

The spelling of 43250749 in words is "forty-three million, two hundred fifty thousand, seven hundred forty-nine".