3909790987 has 8 divisors (see below), whose sum is σ = 4117478400. Its totient is φ = 3702294504.

The previous prime is 3909790981. The next prime is 3909791029. The reversal of 3909790987 is 7890979093.

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 3909790987 - 2³ = 3909790979 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3909790981) 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, 4687 + ... + 88552.

It is an arithmetic number, because the mean of its divisors is an integer number (514684800).

Almost surely, 2^3909790987 is an apocalyptic number.

3909790987 is a deficient number, since it is larger than the sum of its proper divisors (207687413).

3909790987 is a wasteful number, since it uses less digits than its factorization.

3909790987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95465.

The product of its (nonzero) digits is 7715736, while the sum is 61.

The square root of 3909790987 is about 62528.3214791505. The cubic root of 3909790987 is about 1575.3770474803.

The spelling of 3909790987 in words is "three billion, nine hundred nine million, seven hundred ninety thousand, nine hundred eighty-seven".