2781433697 has 12 divisors (see below), whose sum is σ = 3253431636. Its totient is φ = 2370906720.

The previous prime is 2781433691. The next prime is 2781433709. The reversal of 2781433697 is 7963341872.

2781433697 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 1248632896 + 1532800801 = 35336^2 + 39151^2 .

It is not a de Polignac number, because 2781433697 - 2²⁴ = 2764656481 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2781433691) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 147938 + ... + 165675.

It is an arithmetic number, because the mean of its divisors is an integer number (271119303).

Almost surely, 2^2781433697 is an apocalyptic number.

It is an amenable number.

2781433697 is a deficient number, since it is larger than the sum of its proper divisors (471997939).

2781433697 is a wasteful number, since it uses less digits than its factorization.

2781433697 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 313808 (or 313801 counting only the distinct ones).

The product of its digits is 1524096, while the sum is 50.

The square root of 2781433697 is about 52739.2993601546. The cubic root of 2781433697 is about 1406.3375428181.

The spelling of 2781433697 in words is "two billion, seven hundred eighty-one million, four hundred thirty-three thousand, six hundred ninety-seven".