2685857137 has 2 divisors, whose sum is σ = 2685857138. Its totient is φ = 2685857136.

The previous prime is 2685857117. The next prime is 2685857171. The reversal of 2685857137 is 7317585862.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2682307681 + 3549456 = 51791^2 + 1884^2 .

It is a cyclic number.

It is not a de Polignac number, because 2685857137 - 2¹⁹ = 2685332849 is a prime.

It is not a weakly prime, because it can be changed into another prime (2685857117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1342928568 + 1342928569.

It is an arithmetic number, because the mean of its divisors is an integer number (1342928569).

Almost surely, 2^2685857137 is an apocalyptic number.

It is an amenable number.

2685857137 is a deficient number, since it is larger than the sum of its proper divisors (1).

2685857137 is an equidigital number, since it uses as much as digits as its factorization.

2685857137 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2822400, while the sum is 52.

The square root of 2685857137 is about 51825.2557832569. The cubic root of 2685857137 is about 1390.0410830981.

The spelling of 2685857137 in words is "two billion, six hundred eighty-five million, eight hundred fifty-seven thousand, one hundred thirty-seven".