3871993761 has 12 divisors (see below), whose sum is σ = 5595293392. Its totient is φ = 2580215256.

The previous prime is 3871993759. The next prime is 3871993771. The reversal of 3871993761 is 1673991783.

3871993761 is a `hidden beast` number, since 3 + 87 + 199 + 376 + 1 = 666.

It is not a de Polignac number, because 3871993761 - 2¹ = 3871993759 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 3871993698 and 3871993707.

It is not an unprimeable number, because it can be changed into a prime (3871993721) 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 11 ways as a sum of consecutive naturals, for example, 70531 + ... + 112776.

Almost surely, 2^3871993761 is an apocalyptic number.

It is an amenable number.

3871993761 is a deficient number, since it is larger than the sum of its proper divisors (1723299631).

3871993761 is a wasteful number, since it uses less digits than its factorization.

3871993761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 185660 (or 185657 counting only the distinct ones).

The product of its digits is 1714608, while the sum is 54.

The square root of 3871993761 is about 62225.3466121323. The cubic root of 3871993761 is about 1570.2840387012.

The spelling of 3871993761 in words is "three billion, eight hundred seventy-one million, nine hundred ninety-three thousand, seven hundred sixty-one".