4000862009 has 2 divisors, whose sum is σ = 4000862010. Its totient is φ = 4000862008.

The previous prime is 4000862003. The next prime is 4000862081. The reversal of 4000862009 is 9002680004.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3616819600 + 384042409 = 60140^2 + 19597^2 .

It is a cyclic number.

It is not a de Polignac number, because 4000862009 - 2⁴ = 4000861993 is a prime.

It is not a weakly prime, because it can be changed into another prime (4000862003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2000431004 + 2000431005.

It is an arithmetic number, because the mean of its divisors is an integer number (2000431005).

Almost surely, 2^4000862009 is an apocalyptic number.

It is an amenable number.

4000862009 is a deficient number, since it is larger than the sum of its proper divisors (1).

4000862009 is an equidigital number, since it uses as much as digits as its factorization.

4000862009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 4000862009 is about 63252.3676157660. The cubic root of 4000862009 is about 1587.5150732774.

The spelling of 4000862009 in words is "four billion, eight hundred sixty-two thousand, nine".