3998805619 has 2 divisors, whose sum is σ = 3998805620. Its totient is φ = 3998805618.

The previous prime is 3998805611. The next prime is 3998805631. The reversal of 3998805619 is 9165088993.

It is a weak prime.

It is an emirp because it is prime and its reverse (9165088993) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3998805619 - 2³ = 3998805611 is a prime.

It is a super-2 number, since 2×3998805619² = 31980892757091946322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (3998805611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1999402809 + 1999402810.

It is an arithmetic number, because the mean of its divisors is an integer number (1999402810).

Almost surely, 2^3998805619 is an apocalyptic number.

3998805619 is a deficient number, since it is larger than the sum of its proper divisors (1).

3998805619 is an equidigital number, since it uses as much as digits as its factorization.

3998805619 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4199040, while the sum is 58.

The square root of 3998805619 is about 63236.1100875125. The cubic root of 3998805619 is about 1587.2430394352.

The spelling of 3998805619 in words is "three billion, nine hundred ninety-eight million, eight hundred five thousand, six hundred nineteen".