3986897847 has 16 divisors (see below), whose sum is σ = 5424415488. Its totient is φ = 2604139200.

The previous prime is 3986897843. The next prime is 3986897867. The reversal of 3986897847 is 7487986893.

It is not a de Polignac number, because 3986897847 - 2² = 3986897843 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3986897843) 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, 27213 + ... + 93350.

It is an arithmetic number, because the mean of its divisors is an integer number (339025968).

Almost surely, 2^3986897847 is an apocalyptic number.

3986897847 is a deficient number, since it is larger than the sum of its proper divisors (1437517641).

3986897847 is a wasteful number, since it uses less digits than its factorization.

3986897847 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120790.

The product of its digits is 146313216, while the sum is 69.

The square root of 3986897847 is about 63141.8866284497. The cubic root of 3986897847 is about 1585.6659585107.

The spelling of 3986897847 in words is "three billion, nine hundred eighty-six million, eight hundred ninety-seven thousand, eight hundred forty-seven".