1797541553 has 2 divisors, whose sum is σ = 1797541554. Its totient is φ = 1797541552.

The previous prime is 1797541549. The next prime is 1797541621. The reversal of 1797541553 is 3551457971.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1596242209 + 201299344 = 39953^2 + 14188^2 .

It is an emirp because it is prime and its reverse (3551457971) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1797541553 - 2² = 1797541549 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1797541498 and 1797541507.

It is not a weakly prime, because it can be changed into another prime (1797541153) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 898770776 + 898770777.

It is an arithmetic number, because the mean of its divisors is an integer number (898770777).

Almost surely, 2^1797541553 is an apocalyptic number.

It is an amenable number.

1797541553 is a deficient number, since it is larger than the sum of its proper divisors (1).

1797541553 is an equidigital number, since it uses as much as digits as its factorization.

1797541553 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 661500, while the sum is 47.

The square root of 1797541553 is about 42397.4238957982. The cubic root of 1797541553 is about 1215.8863404503.

The spelling of 1797541553 in words is "one billion, seven hundred ninety-seven million, five hundred forty-one thousand, five hundred fifty-three".