131863687 has 2 divisors, whose sum is σ = 131863688. Its totient is φ = 131863686.

The previous prime is 131863673. The next prime is 131863703. The reversal of 131863687 is 786368131.

It is a weak prime.

It is an emirp because it is prime and its reverse (786368131) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 131863687 - 2⁷ = 131863559 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131863657) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65931843 + 65931844.

It is an arithmetic number, because the mean of its divisors is an integer number (65931844).

Almost surely, 2^131863687 is an apocalyptic number.

131863687 is a deficient number, since it is larger than the sum of its proper divisors (1).

131863687 is an equidigital number, since it uses as much as digits as its factorization.

131863687 is an evil number, because the sum of its binary digits is even.

The product of its digits is 145152, while the sum is 43.

The square root of 131863687 is about 11483.1914988822. The cubic root of 131863687 is about 508.9890096348.

The spelling of 131863687 in words is "one hundred thirty-one million, eight hundred sixty-three thousand, six hundred eighty-seven".