43500749 has 2 divisors, whose sum is σ = 43500750. Its totient is φ = 43500748.

The previous prime is 43500731. The next prime is 43500761. The reversal of 43500749 is 94700534.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 43494025 + 6724 = 6595^2 + 82^2 .

It is a cyclic number.

It is not a de Polignac number, because 43500749 - 2¹⁶ = 43435213 is a prime.

It is a super-2 number, since 2×43500749² = 3784630327122002, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43500799) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21750374 + 21750375.

It is an arithmetic number, because the mean of its divisors is an integer number (21750375).

Almost surely, 2^43500749 is an apocalyptic number.

It is an amenable number.

43500749 is a deficient number, since it is larger than the sum of its proper divisors (1).

43500749 is an equidigital number, since it uses as much as digits as its factorization.

43500749 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15120, while the sum is 32.

The square root of 43500749 is about 6595.5097604355. The cubic root of 43500749 is about 351.6945013145.

The spelling of 43500749 in words is "forty-three million, five hundred thousand, seven hundred forty-nine".