1798912897 has 2 divisors, whose sum is σ = 1798912898. Its totient is φ = 1798912896.

The previous prime is 1798912861. The next prime is 1798912901. The reversal of 1798912897 is 7982198971.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1639926016 + 158986881 = 40496^2 + 12609^2 .

It is an emirp because it is prime and its reverse (7982198971) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1798912897 - 2⁷ = 1798912769 is a prime.

It is a super-2 number, since 2×1798912897² = 6472175221985865218, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1799912897) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 899456448 + 899456449.

It is an arithmetic number, because the mean of its divisors is an integer number (899456449).

Almost surely, 2^1798912897 is an apocalyptic number.

It is an amenable number.

1798912897 is a deficient number, since it is larger than the sum of its proper divisors (1).

1798912897 is an equidigital number, since it uses as much as digits as its factorization.

1798912897 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4572288, while the sum is 61.

The square root of 1798912897 is about 42413.5933045056. The cubic root of 1798912897 is about 1216.1954616489.

The spelling of 1798912897 in words is "one billion, seven hundred ninety-eight million, nine hundred twelve thousand, eight hundred ninety-seven".