663254429 has 2 divisors, whose sum is σ = 663254430. Its totient is φ = 663254428.

The previous prime is 663254407. The next prime is 663254467. The reversal of 663254429 is 924452366.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 431392900 + 231861529 = 20770^2 + 15227^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-663254429 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (663254029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 331627214 + 331627215.

It is an arithmetic number, because the mean of its divisors is an integer number (331627215).

Almost surely, 2^663254429 is an apocalyptic number.

It is an amenable number.

663254429 is a deficient number, since it is larger than the sum of its proper divisors (1).

663254429 is an equidigital number, since it uses as much as digits as its factorization.

663254429 is an evil number, because the sum of its binary digits is even.

The product of its digits is 311040, while the sum is 41.

The square root of 663254429 is about 25753.7265070514. The cubic root of 663254429 is about 872.0874825433.

The spelling of 663254429 in words is "six hundred sixty-three million, two hundred fifty-four thousand, four hundred twenty-nine".