427395987 has 16 divisors (see below), whose sum is σ = 637378560. Its totient is φ = 283041000.

The previous prime is 427395971. The next prime is 427396001. The reversal of 427395987 is 789593724.

427395987 is a `hidden beast` number, since 42 + 7 + 3 + 9 + 598 + 7 = 666.

It is not a de Polignac number, because 427395987 - 2⁴ = 427395971 is a prime.

It is not an unprimeable number, because it can be changed into a prime (427395187) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 48339 + ... + 56492.

It is an arithmetic number, because the mean of its divisors is an integer number (39836160).

Almost surely, 2^427395987 is an apocalyptic number.

427395987 is a deficient number, since it is larger than the sum of its proper divisors (209982573).

427395987 is a wasteful number, since it uses less digits than its factorization.

427395987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104991 (or 104985 counting only the distinct ones).

The product of its digits is 3810240, while the sum is 54.

The square root of 427395987 is about 20673.5576764136. The cubic root of 427395987 is about 753.2575268740.

The spelling of 427395987 in words is "four hundred twenty-seven million, three hundred ninety-five thousand, nine hundred eighty-seven".