2857321691 has 16 divisors (see below), whose sum is σ = 3310694400. Its totient is φ = 2415318048.

The previous prime is 2857321681. The next prime is 2857321697. The reversal of 2857321691 is 1961237582.

It is a cyclic number.

It is not a de Polignac number, because 2857321691 - 2¹⁴ = 2857305307 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2857321697) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 572081 + ... + 577053.

It is an arithmetic number, because the mean of its divisors is an integer number (206918400).

Almost surely, 2^2857321691 is an apocalyptic number.

2857321691 is a deficient number, since it is larger than the sum of its proper divisors (453372709).

2857321691 is a wasteful number, since it uses less digits than its factorization.

2857321691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6098.

The product of its digits is 181440, while the sum is 44.

The square root of 2857321691 is about 53453.9211938657. The cubic root of 2857321691 is about 1419.0130169517.

The spelling of 2857321691 in words is "two billion, eight hundred fifty-seven million, three hundred twenty-one thousand, six hundred ninety-one".