3998431109 has 8 divisors (see below), whose sum is σ = 4007256000. Its totient is φ = 3989617632.

The previous prime is 3998431039. The next prime is 3998431123. The reversal of 3998431109 is 9011348993.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 3998431109 - 2⁸ = 3998430853 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3998431169) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1131257 + ... + 1134785.

It is an arithmetic number, because the mean of its divisors is an integer number (500907000).

Almost surely, 2^3998431109 is an apocalyptic number.

It is an amenable number.

3998431109 is a deficient number, since it is larger than the sum of its proper divisors (8824891).

3998431109 is a wasteful number, since it uses less digits than its factorization.

3998431109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5707.

The product of its (nonzero) digits is 209952, while the sum is 47.

The square root of 3998431109 is about 63233.1488145261. The cubic root of 3998431109 is about 1587.1934865599.

The spelling of 3998431109 in words is "three billion, nine hundred ninety-eight million, four hundred thirty-one thousand, one hundred nine".