3946136391 has 12 divisors (see below), whose sum is σ = 5999973720. Its totient is φ = 2492296560.

The previous prime is 3946136377. The next prime is 3946136431. The reversal of 3946136391 is 1936316493.

3946136391 is a `hidden beast` number, since 3 + 9 + 4 + 6 + 1 + 3 + 639 + 1 = 666.

It is not a de Polignac number, because 3946136391 - 2¹⁷ = 3946005319 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3946136291) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11538240 + ... + 11538581.

It is an arithmetic number, because the mean of its divisors is an integer number (499997810).

Almost surely, 2^3946136391 is an apocalyptic number.

3946136391 is a deficient number, since it is larger than the sum of its proper divisors (2053837329).

3946136391 is a wasteful number, since it uses less digits than its factorization.

3946136391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23076846 (or 23076843 counting only the distinct ones).

The product of its digits is 314928, while the sum is 45.

The square root of 3946136391 is about 62818.2807071317. The cubic root of 3946136391 is about 1580.2435653727.

The spelling of 3946136391 in words is "three billion, nine hundred forty-six million, one hundred thirty-six thousand, three hundred ninety-one".