3947504457 has 16 divisors (see below), whose sum is σ = 5688256448. Its totient is φ = 2420642880.

The previous prime is 3947504453. The next prime is 3947504461. The reversal of 3947504457 is 7544057493.

It is an interprime number because it is at equal distance from previous prime (3947504453) and next prime (3947504461).

It is not a de Polignac number, because 3947504457 - 2² = 3947504453 is a prime.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3947504453) 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, 167794 + ... + 189867.

It is an arithmetic number, because the mean of its divisors is an integer number (355516028).

Almost surely, 2^3947504457 is an apocalyptic number.

It is an amenable number.

3947504457 is a deficient number, since it is larger than the sum of its proper divisors (1740751991).

3947504457 is a wasteful number, since it uses less digits than its factorization.

3947504457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 357960.

The product of its (nonzero) digits is 2116800, while the sum is 48.

The square root of 3947504457 is about 62829.1688390034. The cubic root of 3947504457 is about 1580.4261598142.

The spelling of 3947504457 in words is "three billion, nine hundred forty-seven million, five hundred four thousand, four hundred fifty-seven".