3946091121 has 16 divisors (see below), whose sum is σ = 6681212800. Its totient is φ = 2254909104.

The previous prime is 3946091101. The next prime is 3946091137. The reversal of 3946091121 is 1211906493.

It is a happy number.

3946091121 is a `hidden beast` number, since 39 + 4 + 609 + 1 + 12 + 1 = 666.

3946091121 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 3946091121 - 2¹⁵ = 3946058353 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3946091101) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10439206 + ... + 10439583.

It is an arithmetic number, because the mean of its divisors is an integer number (417575800).

Almost surely, 2^3946091121 is an apocalyptic number.

It is an amenable number.

3946091121 is a deficient number, since it is larger than the sum of its proper divisors (2735121679).

3946091121 is a wasteful number, since it uses less digits than its factorization.

3946091121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20878805 (or 20878799 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 36.

The square root of 3946091121 is about 62817.9203810505. The cubic root of 3946091121 is about 1580.2375225085.

The spelling of 3946091121 in words is "three billion, nine hundred forty-six million, ninety-one thousand, one hundred twenty-one".