663790273 has 2 divisors, whose sum is σ = 663790274. Its totient is φ = 663790272.

The previous prime is 663790261. The next prime is 663790277. The reversal of 663790273 is 372097366.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 611473984 + 52316289 = 24728^2 + 7233^2 .

It is a cyclic number.

It is not a de Polignac number, because 663790273 - 2²⁵ = 630235841 is a prime.

It is not a weakly prime, because it can be changed into another prime (663790277) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 331895136 + 331895137.

It is an arithmetic number, because the mean of its divisors is an integer number (331895137).

Almost surely, 2^663790273 is an apocalyptic number.

It is an amenable number.

663790273 is a deficient number, since it is larger than the sum of its proper divisors (1).

663790273 is an equidigital number, since it uses as much as digits as its factorization.

663790273 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 285768, while the sum is 43.

The square root of 663790273 is about 25764.1276390255. The cubic root of 663790273 is about 872.3222728119.

The spelling of 663790273 in words is "six hundred sixty-three million, seven hundred ninety thousand, two hundred seventy-three".