1849169897 has 2 divisors, whose sum is σ = 1849169898. Its totient is φ = 1849169896.

The previous prime is 1849169873. The next prime is 1849169899. The reversal of 1849169897 is 7989619481.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1393603561 + 455566336 = 37331^2 + 21344^2 .

It is a cyclic number.

It is not a de Polignac number, because 1849169897 - 2¹⁰ = 1849168873 is a prime.

Together with 1849169899, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1849169899) 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 as a sum of consecutive naturals, namely, 924584948 + 924584949.

It is an arithmetic number, because the mean of its divisors is an integer number (924584949).

Almost surely, 2^1849169897 is an apocalyptic number.

It is an amenable number.

1849169897 is a deficient number, since it is larger than the sum of its proper divisors (1).

1849169897 is an equidigital number, since it uses as much as digits as its factorization.

1849169897 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7838208, while the sum is 62.

The square root of 1849169897 is about 43001.9755011325. The cubic root of 1849169897 is about 1227.4173887601.

It can be divided in two parts, 18491 and 69897, that added together give a palindrome (88388).

The spelling of 1849169897 in words is "one billion, eight hundred forty-nine million, one hundred sixty-nine thousand, eight hundred ninety-seven".