1653242273 has 2 divisors, whose sum is σ = 1653242274. Its totient is φ = 1653242272.

The previous prime is 1653242263. The next prime is 1653242287. The reversal of 1653242273 is 3722423561.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1627557649 + 25684624 = 40343^2 + 5068^2 .

It is an emirp because it is prime and its reverse (3722423561) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1653242273 is a prime.

It is not a weakly prime, because it can be changed into another prime (1653242233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 826621136 + 826621137.

It is an arithmetic number, because the mean of its divisors is an integer number (826621137).

Almost surely, 2^1653242273 is an apocalyptic number.

It is an amenable number.

1653242273 is a deficient number, since it is larger than the sum of its proper divisors (1).

1653242273 is an equidigital number, since it uses as much as digits as its factorization.

1653242273 is an evil number, because the sum of its binary digits is even.

The product of its digits is 60480, while the sum is 35.

The square root of 1653242273 is about 40660.0820584514. The cubic root of 1653242273 is about 1182.4392406060.

The spelling of 1653242273 in words is "one billion, six hundred fifty-three million, two hundred forty-two thousand, two hundred seventy-three".