131069987 has 2 divisors, whose sum is σ = 131069988. Its totient is φ = 131069986.

The previous prime is 131069909. The next prime is 131070041. The reversal of 131069987 is 789960131.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 131069987 - 2¹⁴ = 131053603 is a prime.

It is not a weakly prime, because it can be changed into another prime (131069287) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65534993 + 65534994.

It is an arithmetic number, because the mean of its divisors is an integer number (65534994).

Almost surely, 2^131069987 is an apocalyptic number.

131069987 is a deficient number, since it is larger than the sum of its proper divisors (1).

131069987 is an equidigital number, since it uses as much as digits as its factorization.

131069987 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 81648, while the sum is 44.

The square root of 131069987 is about 11448.5801303044. The cubic root of 131069987 is about 507.9657361622.

The spelling of 131069987 in words is "one hundred thirty-one million, sixty-nine thousand, nine hundred eighty-seven".