3998118907 has 2 divisors, whose sum is σ = 3998118908. Its totient is φ = 3998118906.

The previous prime is 3998118851. The next prime is 3998118983. The reversal of 3998118907 is 7098118993.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 3998118907 - 2¹⁵ = 3998086139 is a prime.

It is not a weakly prime, because it can be changed into another prime (3998118107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1999059453 + 1999059454.

It is an arithmetic number, because the mean of its divisors is an integer number (1999059454).

Almost surely, 2^3998118907 is an apocalyptic number.

3998118907 is a deficient number, since it is larger than the sum of its proper divisors (1).

3998118907 is an equidigital number, since it uses as much as digits as its factorization.

3998118907 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 979776, while the sum is 55.

The square root of 3998118907 is about 63230.6801086308. The cubic root of 3998118907 is about 1587.1521755336.

The spelling of 3998118907 in words is "three billion, nine hundred ninety-eight million, one hundred eighteen thousand, nine hundred seven".