1648520273 has 2 divisors, whose sum is σ = 1648520274. Its totient is φ = 1648520272.

The previous prime is 1648520261. The next prime is 1648520317. The reversal of 1648520273 is 3720258461.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1593047569 + 55472704 = 39913^2 + 7448^2 .

It is a cyclic number.

It is not a de Polignac number, because 1648520273 - 2²⁰ = 1647471697 is a prime.

It is not a weakly prime, because it can be changed into another prime (1648520213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 824260136 + 824260137.

It is an arithmetic number, because the mean of its divisors is an integer number (824260137).

Almost surely, 2^1648520273 is an apocalyptic number.

It is an amenable number.

1648520273 is a deficient number, since it is larger than the sum of its proper divisors (1).

1648520273 is an equidigital number, since it uses as much as digits as its factorization.

1648520273 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 80640, while the sum is 38.

The square root of 1648520273 is about 40601.9737574419. The cubic root of 1648520273 is about 1181.3124038661.

The spelling of 1648520273 in words is "one billion, six hundred forty-eight million, five hundred twenty thousand, two hundred seventy-three".