4005161939 has 2 divisors, whose sum is σ = 4005161940. Its totient is φ = 4005161938.

The previous prime is 4005161861. The next prime is 4005162023. The reversal of 4005161939 is 9391615004.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 4005161939 - 2¹² = 4005157843 is a prime.

It is a super-2 number, since 2×4005161939² = 32082644315228479442, which contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (4005167939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2002580969 + 2002580970.

It is an arithmetic number, because the mean of its divisors is an integer number (2002580970).

Almost surely, 2^4005161939 is an apocalyptic number.

4005161939 is a deficient number, since it is larger than the sum of its proper divisors (1).

4005161939 is an equidigital number, since it uses as much as digits as its factorization.

4005161939 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 29160, while the sum is 38.

The square root of 4005161939 is about 63286.3487570582. The cubic root of 4005161939 is about 1588.0835973974.

The spelling of 4005161939 in words is "four billion, five million, one hundred sixty-one thousand, nine hundred thirty-nine".