3942896809 has 2 divisors, whose sum is σ = 3942896810. Its totient is φ = 3942896808.

The previous prime is 3942896807. The next prime is 3942896843. The reversal of 3942896809 is 9086982493.

3942896809 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2347693209 + 1595203600 = 48453^2 + 39940^2 .

It is a cyclic number.

It is not a de Polignac number, because 3942896809 - 2¹ = 3942896807 is a prime.

It is a super-3 number, since 3×3942896809³ (a number of 30 digits) contains 333 as substring.

Together with 3942896807, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (3942896801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1971448404 + 1971448405.

It is an arithmetic number, because the mean of its divisors is an integer number (1971448405).

Almost surely, 2^3942896809 is an apocalyptic number.

It is an amenable number.

3942896809 is a deficient number, since it is larger than the sum of its proper divisors (1).

3942896809 is an equidigital number, since it uses as much as digits as its factorization.

3942896809 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6718464, while the sum is 58.

The square root of 3942896809 is about 62792.4900684787. The cubic root of 3942896809 is about 1579.8110131540.

The spelling of 3942896809 in words is "three billion, nine hundred forty-two million, eight hundred ninety-six thousand, eight hundred nine".