4002040109 has 2 divisors, whose sum is σ = 4002040110. Its totient is φ = 4002040108.

The previous prime is 4002040039. The next prime is 4002040111. The reversal of 4002040109 is 9010402004.

4002040109 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2067975625 + 1934064484 = 45475^2 + 43978^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4002040109 is a prime.

Together with 4002040111, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4002040199) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2001020054 + 2001020055.

It is an arithmetic number, because the mean of its divisors is an integer number (2001020055).

Almost surely, 2^4002040109 is an apocalyptic number.

It is an amenable number.

4002040109 is a deficient number, since it is larger than the sum of its proper divisors (1).

4002040109 is an equidigital number, since it uses as much as digits as its factorization.

4002040109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 4002040109 is about 63261.6796251886. The cubic root of 4002040109 is about 1587.6708786981.

The spelling of 4002040109 in words is "four billion, two million, forty thousand, one hundred nine".