2786783997 has 16 divisors (see below), whose sum is σ = 3782653952. Its totient is φ = 1824554160.

The previous prime is 2786783969. The next prime is 2786783999. The reversal of 2786783997 is 7993876872.

It is not a de Polignac number, because 2786783997 - 2²⁸ = 2518348541 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 (2786783999) 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 in 15 ways as a sum of consecutive naturals, for example, 45588 + ... + 87474.

It is an arithmetic number, because the mean of its divisors is an integer number (236415872).

Almost surely, 2^2786783997 is an apocalyptic number.

It is an amenable number.

2786783997 is a deficient number, since it is larger than the sum of its proper divisors (995869955).

2786783997 is a wasteful number, since it uses less digits than its factorization.

2786783997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42288.

The product of its digits is 64012032, while the sum is 66.

The square root of 2786783997 is about 52789.9990244364. Note that the first 3 decimals coincide. The cubic root of 2786783997 is about 1407.2386977840.

The spelling of 2786783997 in words is "two billion, seven hundred eighty-six million, seven hundred eighty-three thousand, nine hundred ninety-seven".