3691427987 has 32 divisors (see below), whose sum is σ = 4254308352. Its totient is φ = 3176578944.

The previous prime is 3691427963. The next prime is 3691428007. The reversal of 3691427987 is 7897241963.

It is a de Polignac number, because none of the positive numbers 2^k-3691427987 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3691427917) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4876013 + ... + 4876769.

It is an arithmetic number, because the mean of its divisors is an integer number (132947136).

Almost surely, 2^3691427987 is an apocalyptic number.

3691427987 is a deficient number, since it is larger than the sum of its proper divisors (562880365).

3691427987 is a wasteful number, since it uses less digits than its factorization.

3691427987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1187.

The product of its digits is 4572288, while the sum is 56.

The square root of 3691427987 is about 60757.1229322126. The cubic root of 3691427987 is about 1545.4850209673.

The spelling of 3691427987 in words is "three billion, six hundred ninety-one million, four hundred twenty-seven thousand, nine hundred eighty-seven".