3897505571 has 4 divisors (see below), whose sum is σ = 3897631944. Its totient is φ = 3897379200.

The previous prime is 3897505543. The next prime is 3897505613. The reversal of 3897505571 is 1755057983.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 3897505571 - 2²⁶ = 3830396707 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3897505541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16976 + ... + 89906.

It is an arithmetic number, because the mean of its divisors is an integer number (974407986).

Almost surely, 2^3897505571 is an apocalyptic number.

3897505571 is a deficient number, since it is larger than the sum of its proper divisors (126373).

3897505571 is an equidigital number, since it uses as much as digits as its factorization.

3897505571 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126372.

The product of its (nonzero) digits is 1323000, while the sum is 50.

The square root of 3897505571 is about 62430.0053740187. The cubic root of 3897505571 is about 1573.7252567514.

The spelling of 3897505571 in words is "three billion, eight hundred ninety-seven million, five hundred five thousand, five hundred seventy-one".