2784166849 has 4 divisors (see below), whose sum is σ = 2786344960. Its totient is φ = 2781988740.

The previous prime is 2784166831. The next prime is 2784166867. The reversal of 2784166849 is 9486614872.

It is a happy number.

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.

It is an interprime number because it is at equal distance from previous prime (2784166831) and next prime (2784166867).

It is a cyclic number.

It is not a de Polignac number, because 2784166849 - 2⁹ = 2784166337 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2784166849.

It is not an unprimeable number, because it can be changed into a prime (2784166829) 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, 1087137 + ... + 1089694.

It is an arithmetic number, because the mean of its divisors is an integer number (696586240).

Almost surely, 2^2784166849 is an apocalyptic number.

It is an amenable number.

2784166849 is a deficient number, since it is larger than the sum of its proper divisors (2178111).

2784166849 is a wasteful number, since it uses less digits than its factorization.

2784166849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2178110.

The product of its digits is 4644864, while the sum is 55.

The square root of 2784166849 is about 52765.2049081589. The cubic root of 2784166849 is about 1406.7980338656.

The spelling of 2784166849 in words is "two billion, seven hundred eighty-four million, one hundred sixty-six thousand, eight hundred forty-nine".