131230987 has 2 divisors, whose sum is σ = 131230988. Its totient is φ = 131230986.

The previous prime is 131230907. The next prime is 131230991. The reversal of 131230987 is 789032131.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 131230987 - 2¹⁵ = 131198219 is a prime.

It is not a weakly prime, because it can be changed into another prime (131230907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65615493 + 65615494.

It is an arithmetic number, because the mean of its divisors is an integer number (65615494).

Almost surely, 2^131230987 is an apocalyptic number.

131230987 is a deficient number, since it is larger than the sum of its proper divisors (1).

131230987 is an equidigital number, since it uses as much as digits as its factorization.

131230987 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9072, while the sum is 34.

The square root of 131230987 is about 11455.6094119868. The cubic root of 131230987 is about 508.1736378650.

The spelling of 131230987 in words is "one hundred thirty-one million, two hundred thirty thousand, nine hundred eighty-seven".