2097558857 has 2 divisors, whose sum is σ = 2097558858. Its totient is φ = 2097558856.

The previous prime is 2097558851. The next prime is 2097558887. The reversal of 2097558857 is 7588557902.

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., 1623364681 + 474194176 = 40291^2 + 21776^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2097558857 is a prime.

It is not a weakly prime, because it can be changed into another prime (2097558851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1048779428 + 1048779429.

It is an arithmetic number, because the mean of its divisors is an integer number (1048779429).

Almost surely, 2^2097558857 is an apocalyptic number.

It is an amenable number.

2097558857 is a deficient number, since it is larger than the sum of its proper divisors (1).

2097558857 is an equidigital number, since it uses as much as digits as its factorization.

2097558857 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7056000, while the sum is 56.

The square root of 2097558857 is about 45799.1141508217. The cubic root of 2097558857 is about 1280.0827699162.

The spelling of 2097558857 in words is "two billion, ninety-seven million, five hundred fifty-eight thousand, eight hundred fifty-seven".