40043129 has 4 divisors (see below), whose sum is σ = 45763584. Its totient is φ = 34322676.

The previous prime is 40043119. The next prime is 40043141. The reversal of 40043129 is 92134004.

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 40043129 - 2¹² = 40039033 is a prime.

It is a super-2 number, since 2×40043129² = 3206904360221282, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40043119) 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, 2860217 + ... + 2860230.

It is an arithmetic number, because the mean of its divisors is an integer number (11440896).

Almost surely, 2^40043129 is an apocalyptic number.

It is an amenable number.

40043129 is a deficient number, since it is larger than the sum of its proper divisors (5720455).

40043129 is an equidigital number, since it uses as much as digits as its factorization.

40043129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5720454.

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 40043129 is about 6327.9640485704. The cubic root of 40043129 is about 342.1180611058.

The spelling of 40043129 in words is "forty million, forty-three thousand, one hundred twenty-nine".