12487789 has 2 divisors, whose sum is σ = 12487790. Its totient is φ = 12487788.

The previous prime is 12487757. The next prime is 12487793. The reversal of 12487789 is 98778421.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12075625 + 412164 = 3475^2 + 642^2 .

It is a cyclic number.

It is not a de Polignac number, because 12487789 - 2⁵ = 12487757 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12487729) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6243894 + 6243895.

It is an arithmetic number, because the mean of its divisors is an integer number (6243895).

Almost surely, 2^12487789 is an apocalyptic number.

It is an amenable number.

12487789 is a deficient number, since it is larger than the sum of its proper divisors (1).

12487789 is an equidigital number, since it uses as much as digits as its factorization.

12487789 is an evil number, because the sum of its binary digits is even.

The product of its digits is 225792, while the sum is 46.

The square root of 12487789 is about 3533.8065878030. The cubic root of 12487789 is about 232.0038458043.

The spelling of 12487789 in words is "twelve million, four hundred eighty-seven thousand, seven hundred eighty-nine".