1287193713 has 8 divisors (see below), whose sum is σ = 1848278208. Its totient is φ = 792119184.

The previous prime is 1287193697. The next prime is 1287193717. The reversal of 1287193713 is 3173917821.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1287193713 - 2⁴ = 1287193697 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1287193717) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16502445 + ... + 16502522.

It is an arithmetic number, because the mean of its divisors is an integer number (231034776).

Almost surely, 2^1287193713 is an apocalyptic number.

1287193713 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1287193713 is a deficient number, since it is larger than the sum of its proper divisors (561084495).

1287193713 is a wasteful number, since it uses less digits than its factorization.

1287193713 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33004983.

The product of its digits is 63504, while the sum is 42.

The square root of 1287193713 is about 35877.4819768612. The cubic root of 1287193713 is about 1087.7972835561.

It can be divided in two parts, 1287 and 193713, that added together give a triangular number (195000 = T₆₂₄).

The spelling of 1287193713 in words is "one billion, two hundred eighty-seven million, one hundred ninety-three thousand, seven hundred thirteen".