3946555731 has 4 divisors (see below), whose sum is σ = 5262074312. Its totient is φ = 2631037152.

The previous prime is 3946555727. The next prime is 3946555733. The reversal of 3946555731 is 1375556493.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1375556493 = 3 ⋅458518831.

It is not a de Polignac number, because 3946555731 - 2² = 3946555727 is a prime.

It is a super-2 number, since 2×3946555731² = 31150604275777888722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3946555733) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 657759286 + ... + 657759291.

It is an arithmetic number, because the mean of its divisors is an integer number (1315518578).

Almost surely, 2^3946555731 is an apocalyptic number.

3946555731 is a deficient number, since it is larger than the sum of its proper divisors (1315518581).

3946555731 is a wasteful number, since it uses less digits than its factorization.

3946555731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1315518580.

The product of its digits is 1701000, while the sum is 48.

The square root of 3946555731 is about 62821.6183411411. The cubic root of 3946555731 is about 1580.2995387603.

The spelling of 3946555731 in words is "three billion, nine hundred forty-six million, five hundred fifty-five thousand, seven hundred thirty-one".