2684857387 has 4 divisors (see below), whose sum is σ = 2686559320. Its totient is φ = 2683155456.

The previous prime is 2684857361. The next prime is 2684857429. The reversal of 2684857387 is 7837584862.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7837584862 = 2 ⋅3918792431.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2684857387 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2684855387) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 848598 + ... + 851755.

It is an arithmetic number, because the mean of its divisors is an integer number (671639830).

Almost surely, 2^2684857387 is an apocalyptic number.

2684857387 is a deficient number, since it is larger than the sum of its proper divisors (1701933).

2684857387 is a wasteful number, since it uses less digits than its factorization.

2684857387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1701932.

The product of its digits is 18063360, while the sum is 58.

The square root of 2684857387 is about 51815.6094917352. The cubic root of 2684857387 is about 1389.8685911691.

The spelling of 2684857387 in words is "two billion, six hundred eighty-four million, eight hundred fifty-seven thousand, three hundred eighty-seven".