425305987 has 2 divisors, whose sum is σ = 425305988. Its totient is φ = 425305986.

The previous prime is 425305943. The next prime is 425305999. The reversal of 425305987 is 789503524.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-425305987 is a prime.

It is a super-3 number, since 3×425305987³ (a number of 27 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (425305927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 212652993 + 212652994.

It is an arithmetic number, because the mean of its divisors is an integer number (212652994).

Almost surely, 2^425305987 is an apocalyptic number.

425305987 is a deficient number, since it is larger than the sum of its proper divisors (1).

425305987 is an equidigital number, since it uses as much as digits as its factorization.

425305987 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 302400, while the sum is 43.

The square root of 425305987 is about 20622.9480676260. The cubic root of 425305987 is about 752.0276905027.

The spelling of 425305987 in words is "four hundred twenty-five million, three hundred five thousand, nine hundred eighty-seven".