3938157687 has 8 divisors (see below), whose sum is σ = 5252407920. Its totient is φ = 2624672960.

The previous prime is 3938157677. The next prime is 3938157697. The reversal of 3938157687 is 7867518393.

It is an interprime number because it is at equal distance from previous prime (3938157677) and next prime (3938157697).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 3938157687 - 2¹⁴ = 3938141303 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3938157647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 179262 + ... + 200027.

It is an arithmetic number, because the mean of its divisors is an integer number (656550990).

Almost surely, 2^3938157687 is an apocalyptic number.

3938157687 is a deficient number, since it is larger than the sum of its proper divisors (1314250233).

3938157687 is a wasteful number, since it uses less digits than its factorization.

3938157687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 382753.

The product of its digits is 7620480, while the sum is 57.

The square root of 3938157687 is about 62754.7423466944. The cubic root of 3938157687 is about 1579.1778138336.

The spelling of 3938157687 in words is "three billion, nine hundred thirty-eight million, one hundred fifty-seven thousand, six hundred eighty-seven".