3908931946 has 4 divisors (see below), whose sum is σ = 5863397922. Its totient is φ = 1954465972.

The previous prime is 3908931853. The next prime is 3908931967. The reversal of 3908931946 is 6491398093.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6491398093 = 907 ⋅7156999.

It can be written as a sum of positive squares in only one way, i.e., 2907905625 + 1001026321 = 53925^2 + 31639^2 .

It is a junction number, because it is equal to n+sod(n) for n = 3908931893 and 3908931902.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 977232985 + ... + 977232988.

Almost surely, 2^3908931946 is an apocalyptic number.

3908931946 is a deficient number, since it is larger than the sum of its proper divisors (1954465976).

3908931946 is a wasteful number, since it uses less digits than its factorization.

3908931946 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1954465975.

The product of its (nonzero) digits is 1259712, while the sum is 52.

The square root of 3908931946 is about 62521.4518865325. The cubic root of 3908931946 is about 1575.2616608688.

The spelling of 3908931946 in words is "three billion, nine hundred eight million, nine hundred thirty-one thousand, nine hundred forty-six".