1653398273 has 2 divisors, whose sum is σ = 1653398274. Its totient is φ = 1653398272.

The previous prime is 1653398239. The next prime is 1653398281. The reversal of 1653398273 is 3728933561.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 992754064 + 660644209 = 31508^2 + 25703^2 .

It is a cyclic number.

It is not a de Polignac number, because 1653398273 - 2²⁶ = 1586289409 is a prime.

It is not a weakly prime, because it can be changed into another prime (1653398213) 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, 826699136 + 826699137.

It is an arithmetic number, because the mean of its divisors is an integer number (826699137).

Almost surely, 2^1653398273 is an apocalyptic number.

It is an amenable number.

1653398273 is a deficient number, since it is larger than the sum of its proper divisors (1).

1653398273 is an equidigital number, since it uses as much as digits as its factorization.

1653398273 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 816480, while the sum is 47.

The square root of 1653398273 is about 40662.0003565983. Note that the first 3 decimals coincide. The cubic root of 1653398273 is about 1182.4764311059.

The spelling of 1653398273 in words is "one billion, six hundred fifty-three million, three hundred ninety-eight thousand, two hundred seventy-three".