3866840819 has 2 divisors, whose sum is σ = 3866840820. Its totient is φ = 3866840818.

The previous prime is 3866840797. The next prime is 3866840827. The reversal of 3866840819 is 9180486683.

It is a strong prime.

It is an emirp because it is prime and its reverse (9180486683) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3866840819 - 2¹² = 3866836723 is a prime.

It is a super-2 number, since 2×3866840819² = 29904915838969181522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (3866840849) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1933420409 + 1933420410.

It is an arithmetic number, because the mean of its divisors is an integer number (1933420410).

Almost surely, 2^3866840819 is an apocalyptic number.

3866840819 is a deficient number, since it is larger than the sum of its proper divisors (1).

3866840819 is an equidigital number, since it uses as much as digits as its factorization.

3866840819 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1990656, while the sum is 53.

The square root of 3866840819 is about 62183.9273365715. The cubic root of 3866840819 is about 1569.5871389280.

The spelling of 3866840819 in words is "three billion, eight hundred sixty-six million, eight hundred forty thousand, eight hundred nineteen".