63425309 has 2 divisors, whose sum is σ = 63425310. Its totient is φ = 63425308.

The previous prime is 63425281. The next prime is 63425321. The reversal of 63425309 is 90352436.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 50623225 + 12802084 = 7115^2 + 3578^2 .

It is a cyclic number.

It is not a de Polignac number, because 63425309 - 2¹⁶ = 63359773 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (63425339) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31712654 + 31712655.

It is an arithmetic number, because the mean of its divisors is an integer number (31712655).

Almost surely, 2^63425309 is an apocalyptic number.

It is an amenable number.

63425309 is a deficient number, since it is larger than the sum of its proper divisors (1).

63425309 is an equidigital number, since it uses as much as digits as its factorization.

63425309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 19440, while the sum is 32.

The square root of 63425309 is about 7964.0008161727. Note that the first 3 decimals coincide. The cubic root of 63425309 is about 398.7991254419.

The spelling of 63425309 in words is "sixty-three million, four hundred twenty-five thousand, three hundred nine".