1487396509 has 2 divisors, whose sum is σ = 1487396510. Its totient is φ = 1487396508.

The previous prime is 1487396507. The next prime is 1487396527. The reversal of 1487396509 is 9056937841.

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., 1046522500 + 440874009 = 32350^2 + 20997^2 .

It is a cyclic number.

It is not a de Polignac number, because 1487396509 - 2¹ = 1487396507 is a prime.

Together with 1487396507, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1487396501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 743698254 + 743698255.

It is an arithmetic number, because the mean of its divisors is an integer number (743698255).

Almost surely, 2^1487396509 is an apocalyptic number.

It is an amenable number.

1487396509 is a deficient number, since it is larger than the sum of its proper divisors (1).

1487396509 is an equidigital number, since it uses as much as digits as its factorization.

1487396509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1632960, while the sum is 52.

The square root of 1487396509 is about 38566.7798629857. The cubic root of 1487396509 is about 1141.4991329446.

The spelling of 1487396509 in words is "one billion, four hundred eighty-seven million, three hundred ninety-six thousand, five hundred nine".