3947933505 has 16 divisors (see below), whose sum is σ = 6358529664. Its totient is φ = 2091619200.

The previous prime is 3947933503. The next prime is 3947933543. The reversal of 3947933505 is 5053397493.

3947933505 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 3947933505 - 2¹ = 3947933503 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3947933503) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 869244 + ... + 873773.

It is an arithmetic number, because the mean of its divisors is an integer number (397408104).

Almost surely, 2^3947933505 is an apocalyptic number.

It is an amenable number.

3947933505 is a deficient number, since it is larger than the sum of its proper divisors (2410596159).

3947933505 is a wasteful number, since it uses less digits than its factorization.

3947933505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1743176.

The product of its (nonzero) digits is 1530900, while the sum is 48.

The square root of 3947933505 is about 62832.5831475995. The cubic root of 3947933505 is about 1580.4834157444.

The spelling of 3947933505 in words is "three billion, nine hundred forty-seven million, nine hundred thirty-three thousand, five hundred five".