43740149 has 4 divisors (see below), whose sum is σ = 45248460. Its totient is φ = 42231840.

The previous prime is 43740143. The next prime is 43740173. The reversal of 43740149 is 94104734.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 33849124 + 9891025 = 5818^2 + 3145^2 .

It is a cyclic number.

It is not a de Polignac number, because 43740149 - 2²⁴ = 26962933 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43740143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 754112 + ... + 754169.

It is an arithmetic number, because the mean of its divisors is an integer number (11312115).

Almost surely, 2^43740149 is an apocalyptic number.

It is an amenable number.

43740149 is a deficient number, since it is larger than the sum of its proper divisors (1508311).

43740149 is a wasteful number, since it uses less digits than its factorization.

43740149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1508310.

The product of its (nonzero) digits is 12096, while the sum is 32.

The square root of 43740149 is about 6613.6335701337. The cubic root of 43740149 is about 352.3384877838.

The spelling of 43740149 in words is "forty-three million, seven hundred forty thousand, one hundred forty-nine".