1798802857 has 2 divisors, whose sum is σ = 1798802858. Its totient is φ = 1798802856.

The previous prime is 1798802849. The next prime is 1798802867. The reversal of 1798802857 is 7582088971.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1796403456 + 2399401 = 42384^2 + 1549^2 .

It is a cyclic number.

It is not a de Polignac number, because 1798802857 - 2³ = 1798802849 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1798802798 and 1798802807.

It is not a weakly prime, because it can be changed into another prime (1798802867) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 899401428 + 899401429.

It is an arithmetic number, because the mean of its divisors is an integer number (899401429).

Almost surely, 2^1798802857 is an apocalyptic number.

It is an amenable number.

1798802857 is a deficient number, since it is larger than the sum of its proper divisors (1).

1798802857 is an equidigital number, since it uses as much as digits as its factorization.

1798802857 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2257920, while the sum is 55.

The square root of 1798802857 is about 42412.2960590440. The cubic root of 1798802857 is about 1216.1706628055.

The spelling of 1798802857 in words is "one billion, seven hundred ninety-eight million, eight hundred two thousand, eight hundred fifty-seven".