1653436549 has 2 divisors, whose sum is σ = 1653436550. Its totient is φ = 1653436548.

The previous prime is 1653436531. The next prime is 1653436621. The reversal of 1653436549 is 9456343561.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1652422500 + 1014049 = 40650^2 + 1007^2 .

It is a cyclic number.

It is not a de Polignac number, because 1653436549 - 2¹⁷ = 1653305477 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1653436499 and 1653436508.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1653436849) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 826718274 + 826718275.

It is an arithmetic number, because the mean of its divisors is an integer number (826718275).

Almost surely, 2^1653436549 is an apocalyptic number.

It is an amenable number.

1653436549 is a deficient number, since it is larger than the sum of its proper divisors (1).

1653436549 is an equidigital number, since it uses as much as digits as its factorization.

1653436549 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1166400, while the sum is 46.

The square root of 1653436549 is about 40662.4710144379. The cubic root of 1653436549 is about 1182.4855557715.

The spelling of 1653436549 in words is "one billion, six hundred fifty-three million, four hundred thirty-six thousand, five hundred forty-nine".