3930021009 has 12 divisors (see below), whose sum is σ = 5975470800. Its totient is φ = 2482118424.

The previous prime is 3930020993. The next prime is 3930021031. The reversal of 3930021009 is 9001200393.

It is not a de Polignac number, because 3930021009 - 2⁴ = 3930020993 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (3930021049) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11491119 + ... + 11491460.

It is an arithmetic number, because the mean of its divisors is an integer number (497955900).

Almost surely, 2^3930021009 is an apocalyptic number.

It is an amenable number.

3930021009 is a deficient number, since it is larger than the sum of its proper divisors (2045449791).

3930021009 is a wasteful number, since it uses less digits than its factorization.

3930021009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22982604 (or 22982601 counting only the distinct ones).

The product of its (nonzero) digits is 1458, while the sum is 27.

The square root of 3930021009 is about 62689.8796377852. The cubic root of 3930021009 is about 1578.0894774497.

The spelling of 3930021009 in words is "three billion, nine hundred thirty million, twenty-one thousand, nine".