3905746947 has 24 divisors (see below), whose sum is σ = 5833563008. Its totient is φ = 2515536000.

The previous prime is 3905746927. The next prime is 3905746993. The reversal of 3905746947 is 7496475093.

It is a happy number.

3905746947 is a `hidden beast` number, since 3 + 9 + 0 + 574 + 69 + 4 + 7 = 666.

It is not a de Polignac number, because 3905746947 - 2¹⁵ = 3905714179 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3905746893 and 3905746902.

It is not an unprimeable number, because it can be changed into a prime (3905746907) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 156033 + ... + 179325.

Almost surely, 2^3905746947 is an apocalyptic number.

3905746947 is a deficient number, since it is larger than the sum of its proper divisors (1927816061).

3905746947 is a wasteful number, since it uses less digits than its factorization.

3905746947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23931 (or 23928 counting only the distinct ones).

The product of its (nonzero) digits is 5715360, while the sum is 54.

The square root of 3905746947 is about 62495.9754464237. The cubic root of 3905746947 is about 1574.8337033794.

The spelling of 3905746947 in words is "three billion, nine hundred five million, seven hundred forty-six thousand, nine hundred forty-seven".