3887420909 has 2 divisors, whose sum is σ = 3887420910. Its totient is φ = 3887420908.

The previous prime is 3887420903. The next prime is 3887420917. The reversal of 3887420909 is 9090247883.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3168001225 + 719419684 = 56285^2 + 26822^2 .

It is a cyclic number.

It is not a de Polignac number, because 3887420909 - 2²⁰ = 3886372333 is a prime.

It is a super-2 number, since 2×3887420909² = 30224082647460772562, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3887420903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1943710454 + 1943710455.

It is an arithmetic number, because the mean of its divisors is an integer number (1943710455).

Almost surely, 2^3887420909 is an apocalyptic number.

It is an amenable number.

3887420909 is a deficient number, since it is larger than the sum of its proper divisors (1).

3887420909 is an equidigital number, since it uses as much as digits as its factorization.

3887420909 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 870912, while the sum is 50.

The square root of 3887420909 is about 62349.1853114377. The cubic root of 3887420909 is about 1572.3667643490.

The spelling of 3887420909 in words is "three billion, eight hundred eighty-seven million, four hundred twenty thousand, nine hundred nine".