3916121409 has 12 divisors (see below), whose sum is σ = 5666039652. Its totient is φ = 2606400000.

The previous prime is 3916121383. The next prime is 3916121441. The reversal of 3916121409 is 9041216193.

It is a happy number.

3916121409 is a `hidden beast` number, since 39 + 1 + 612 + 1 + 4 + 0 + 9 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 2310917184 + 1605204225 = 48072^2 + 40065^2 .

It is not a de Polignac number, because 3916121409 - 2¹⁵ = 3916088641 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3916121609) 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, 356592 + ... + 367409.

It is an arithmetic number, because the mean of its divisors is an integer number (472169971).

Almost surely, 2^3916121409 is an apocalyptic number.

It is an amenable number.

3916121409 is a deficient number, since it is larger than the sum of its proper divisors (1749918243).

3916121409 is a wasteful number, since it uses less digits than its factorization.

3916121409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 724608 (or 724605 counting only the distinct ones).

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

The square root of 3916121409 is about 62578.9214432464. The cubic root of 3916121409 is about 1576.2268306700.

The spelling of 3916121409 in words is "three billion, nine hundred sixteen million, one hundred twenty-one thousand, four hundred nine".