40043929 has 4 divisors (see below), whose sum is σ = 40608000. Its totient is φ = 39479860.

The previous prime is 40043903. The next prime is 40043933. The reversal of 40043929 is 92934004.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 40043929 - 2⁹ = 40043417 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 40043929.

It is not an unprimeable number, because it can be changed into a prime (40043329) 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 3 ways as a sum of consecutive naturals, for example, 281929 + ... + 282070.

It is an arithmetic number, because the mean of its divisors is an integer number (10152000).

Almost surely, 2^40043929 is an apocalyptic number.

It is an amenable number.

40043929 is a deficient number, since it is larger than the sum of its proper divisors (564071).

40043929 is an equidigital number, since it uses as much as digits as its factorization.

40043929 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 564070.

The product of its (nonzero) digits is 7776, while the sum is 31.

The square root of 40043929 is about 6328.0272597390. The cubic root of 40043929 is about 342.1203394211.

The spelling of 40043929 in words is "forty million, forty-three thousand, nine hundred twenty-nine".