1797449813 has 4 divisors (see below), whose sum is σ = 1803584748. Its totient is φ = 1791314880.

The previous prime is 1797449777. The next prime is 1797449861. The reversal of 1797449813 is 3189447971.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1617407089 + 180042724 = 40217^2 + 13418^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1797449813 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1797449113) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3067028 + ... + 3067613.

It is an arithmetic number, because the mean of its divisors is an integer number (450896187).

Almost surely, 2^1797449813 is an apocalyptic number.

It is an amenable number.

1797449813 is a deficient number, since it is larger than the sum of its proper divisors (6134935).

1797449813 is an equidigital number, since it uses as much as digits as its factorization.

1797449813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6134934.

The product of its digits is 1524096, while the sum is 53.

The square root of 1797449813 is about 42396.3419766376. The cubic root of 1797449813 is about 1215.8656552891.

The spelling of 1797449813 in words is "one billion, seven hundred ninety-seven million, four hundred forty-nine thousand, eight hundred thirteen".