40040009929 has 2 divisors, whose sum is σ = 40040009930. Its totient is φ = 40040009928.

The previous prime is 40040009921. The next prime is 40040009939. The reversal of 40040009929 is 92990004004.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22635804304 + 17404205625 = 150452^2 + 131925^2 .

It is a cyclic number.

It is not a de Polignac number, because 40040009929 - 2³ = 40040009921 is a prime.

It is a super-2 number, since 2×40040009929² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (40040009921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20020004964 + 20020004965.

It is an arithmetic number, because the mean of its divisors is an integer number (20020004965).

Almost surely, 2^40040009929 is an apocalyptic number.

It is an amenable number.

40040009929 is a deficient number, since it is larger than the sum of its proper divisors (1).

40040009929 is an equidigital number, since it uses as much as digits as its factorization.

40040009929 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 23328, while the sum is 37.

The spelling of 40040009929 in words is "forty billion, forty million, nine thousand, nine hundred twenty-nine".