1797143057 has 4 divisors (see below), whose sum is σ = 1802812596. Its totient is φ = 1791473520.

The previous prime is 1797143039. The next prime is 1797143071. The reversal of 1797143057 is 7503417971.

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 503374096 + 1293768961 = 22436^2 + 35969^2 .

It is a cyclic number.

It is not a de Polignac number, because 1797143057 - 2⁸ = 1797142801 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1797142999 and 1797143017.

It is not an unprimeable number, because it can be changed into a prime (1797143657) 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, 2834294 + ... + 2834927.

It is an arithmetic number, because the mean of its divisors is an integer number (450703149).

Almost surely, 2^1797143057 is an apocalyptic number.

It is an amenable number.

1797143057 is a deficient number, since it is larger than the sum of its proper divisors (5669539).

1797143057 is an equidigital number, since it uses as much as digits as its factorization.

1797143057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5669538.

The product of its (nonzero) digits is 185220, while the sum is 44.

The square root of 1797143057 is about 42392.7241044970. The cubic root of 1797143057 is about 1215.7964840849.

The spelling of 1797143057 in words is "one billion, seven hundred ninety-seven million, one hundred forty-three thousand, fifty-seven".