12782078237 has 4 divisors (see below), whose sum is σ = 12787304256. Its totient is φ = 12776852220.

The previous prime is 12782078233. The next prime is 12782078279. The reversal of 12782078237 is 73287028721.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 73287028721 = 743 ⋅98636647.

It is a cyclic number.

It is not a de Polignac number, because 12782078237 - 2² = 12782078233 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12782078191 and 12782078200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12782078233) 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, 2609339 + ... + 2614232.

It is an arithmetic number, because the mean of its divisors is an integer number (3196826064).

Almost surely, 2^12782078237 is an apocalyptic number.

It is an amenable number.

12782078237 is a deficient number, since it is larger than the sum of its proper divisors (5226019).

12782078237 is an equidigital number, since it uses as much as digits as its factorization.

12782078237 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5226018.

The product of its (nonzero) digits is 526848, while the sum is 47.

The spelling of 12782078237 in words is "twelve billion, seven hundred eighty-two million, seventy-eight thousand, two hundred thirty-seven".