131006489 has 2 divisors, whose sum is σ = 131006490. Its totient is φ = 131006488.

The previous prime is 131006461. The next prime is 131006567. The reversal of 131006489 is 984600131.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 92006464 + 39000025 = 9592^2 + 6245^2 .

It is an emirp because it is prime and its reverse (984600131) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131006489 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (131006429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65503244 + 65503245.

It is an arithmetic number, because the mean of its divisors is an integer number (65503245).

Almost surely, 2^131006489 is an apocalyptic number.

It is an amenable number.

131006489 is a deficient number, since it is larger than the sum of its proper divisors (1).

131006489 is an equidigital number, since it uses as much as digits as its factorization.

131006489 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5184, while the sum is 32.

The square root of 131006489 is about 11445.8066120305. The cubic root of 131006489 is about 507.8836934328.

The spelling of 131006489 in words is "one hundred thirty-one million, six thousand, four hundred eighty-nine".