787897813247 has 4 divisors (see below), whose sum is σ = 834244743456. Its totient is φ = 741550883040.

The previous prime is 787897813243. The next prime is 787897813253. The reversal of 787897813247 is 742318798787.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 742318798787 = 103 ⋅7206978629.

It is a cyclic number.

It is not a de Polignac number, because 787897813247 - 2² = 787897813243 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (787897813243) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23173465079 + ... + 23173465112.

It is an arithmetic number, because the mean of its divisors is an integer number (208561185864).

Almost surely, 2^787897813247 is an apocalyptic number.

787897813247 is a deficient number, since it is larger than the sum of its proper divisors (46346930209).

787897813247 is a wasteful number, since it uses less digits than its factorization.

787897813247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46346930208.

The product of its digits is 265531392, while the sum is 71.

The spelling of 787897813247 in words is "seven hundred eighty-seven billion, eight hundred ninety-seven million, eight hundred thirteen thousand, two hundred forty-seven".