3998118851 has 2 divisors, whose sum is σ = 3998118852. Its totient is φ = 3998118850.

The previous prime is 3998118841. The next prime is 3998118907. The reversal of 3998118851 is 1588118993.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 3998118851 - 2¹⁴ = 3998102467 is a prime.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 3998118793 and 3998118802.

It is not a weakly prime, because it can be changed into another prime (3998118811) 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, 1999059425 + 1999059426.

It is an arithmetic number, because the mean of its divisors is an integer number (1999059426).

Almost surely, 2^3998118851 is an apocalyptic number.

3998118851 is a deficient number, since it is larger than the sum of its proper divisors (1).

3998118851 is an equidigital number, since it uses as much as digits as its factorization.

3998118851 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 622080, while the sum is 53.

The square root of 3998118851 is about 63230.6796658078. The cubic root of 3998118851 is about 1587.1521681234.

The spelling of 3998118851 in words is "three billion, nine hundred ninety-eight million, one hundred eighteen thousand, eight hundred fifty-one".