425995987 has 2 divisors, whose sum is σ = 425995988. Its totient is φ = 425995986.

The previous prime is 425995957. The next prime is 425996057. The reversal of 425995987 is 789599524.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-425995987 is a prime.

It is not a weakly prime, because it can be changed into another prime (425995937) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 212997993 + 212997994.

It is an arithmetic number, because the mean of its divisors is an integer number (212997994).

Almost surely, 2^425995987 is an apocalyptic number.

425995987 is a deficient number, since it is larger than the sum of its proper divisors (1).

425995987 is an equidigital number, since it uses as much as digits as its factorization.

425995987 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8164800, while the sum is 58.

The square root of 425995987 is about 20639.6702250787. The cubic root of 425995987 is about 752.4341576589.

The spelling of 425995987 in words is "four hundred twenty-five million, nine hundred ninety-five thousand, nine hundred eighty-seven".