3897815039 has 24 divisors (see below), whose sum is σ = 4110543360. Its totient is φ = 3695388480.

The previous prime is 3897815017. The next prime is 3897815081. The reversal of 3897815039 is 9305187983.

It is a happy number.

3897815039 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a de Polignac number, because none of the positive numbers 2^k-3897815039 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3897815239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13302977 + ... + 13303269.

It is an arithmetic number, because the mean of its divisors is an integer number (171272640).

Almost surely, 2^3897815039 is an apocalyptic number.

3897815039 is a deficient number, since it is larger than the sum of its proper divisors (212728321).

3897815039 is a wasteful number, since it uses less digits than its factorization.

3897815039 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 591 (or 560 counting only the distinct ones).

The product of its (nonzero) digits is 1632960, while the sum is 53.

The square root of 3897815039 is about 62432.4838445500. The cubic root of 3897815039 is about 1573.7669077261.

The spelling of 3897815039 in words is "three billion, eight hundred ninety-seven million, eight hundred fifteen thousand, thirty-nine".