43729989 has 16 divisors (see below), whose sum is σ = 59359872. Its totient is φ = 28631808.

The previous prime is 43729951. The next prime is 43729991. The reversal of 43729989 is 98992734.

It is not a de Polignac number, because 43729989 - 2⁸ = 43729733 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43729949) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 41817 + ... + 42849.

It is an arithmetic number, because the mean of its divisors is an integer number (3709992).

Almost surely, 2^43729989 is an apocalyptic number.

It is an amenable number.

43729989 is a deficient number, since it is larger than the sum of its proper divisors (15629883).

43729989 is a wasteful number, since it uses less digits than its factorization.

43729989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1276.

The product of its digits is 979776, while the sum is 51.

The square root of 43729989 is about 6612.8654152342. The cubic root of 43729989 is about 352.3112051741.

The spelling of 43729989 in words is "forty-three million, seven hundred twenty-nine thousand, nine hundred eighty-nine".