1797166449 has 27 divisors (see below), whose sum is σ = 2813541003. Its totient is φ = 1104931152.

The previous prime is 1797166417. The next prime is 1797166451. The reversal of 1797166449 is 9446617971.

The square root of 1797166449 is 42393.

It is a perfect power (a square), and thus also a powerful number.

1797166449 is a `hidden beast` number, since 1 + 79 + 71 + 66 + 449 = 666.

It can be written as a sum of positive squares in only one way, i.e., 265853025 + 1531313424 = 16305^2 + 39132^2 .

It is not a de Polignac number, because 1797166449 - 2⁵ = 1797166417 is a prime.

It is a super-2 number, since 2×1797166449² = 6459614490822539202, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1797166395 and 1797166404.

It is not an unprimeable number, because it can be changed into a prime (1797166499) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 1652784 + ... + 1653870.

Almost surely, 2^1797166449 is an apocalyptic number.

1797166449 is the 42393-rd square number.

1797166449 is the 21197-th centered octagonal number.

It is an amenable number.

1797166449 is a deficient number, since it is larger than the sum of its proper divisors (1016374554).

1797166449 is an equidigital number, since it uses as much as digits as its factorization.

1797166449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2206 (or 1103 counting only the distinct ones).

The product of its digits is 2286144, while the sum is 54.

The cubic root of 1797166449 is about 1215.8017590847.

The spelling of 1797166449 in words is "one billion, seven hundred ninety-seven million, one hundred sixty-six thousand, four hundred forty-nine".