1799686769 has 2 divisors, whose sum is σ = 1799686770. Its totient is φ = 1799686768.

The previous prime is 1799686753. The next prime is 1799686871. The reversal of 1799686769 is 9676869971.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1678950625 + 120736144 = 40975^2 + 10988^2 .

It is a cyclic number.

It is not a de Polignac number, because 1799686769 - 2⁴ = 1799686753 is a prime.

It is a super-2 number, since 2×1799686769² = 6477744933027318722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1799686699 and 1799686708.

It is not a weakly prime, because it can be changed into another prime (1799686069) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 899843384 + 899843385.

It is an arithmetic number, because the mean of its divisors is an integer number (899843385).

Almost surely, 2^1799686769 is an apocalyptic number.

It is an amenable number.

1799686769 is a deficient number, since it is larger than the sum of its proper divisors (1).

1799686769 is an equidigital number, since it uses as much as digits as its factorization.

1799686769 is an evil number, because the sum of its binary digits is even.

The product of its digits is 61725888, while the sum is 68.

The square root of 1799686769 is about 42422.7152478481. The cubic root of 1799686769 is about 1216.3698344950.

The spelling of 1799686769 in words is "one billion, seven hundred ninety-nine million, six hundred eighty-six thousand, seven hundred sixty-nine".