395842987 has 4 divisors (see below), whose sum is σ = 405497736. Its totient is φ = 386188240.

The previous prime is 395842981. The next prime is 395843029. The reversal of 395842987 is 789248593.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-395842987 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (395842981) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4827313 + ... + 4827394.

It is an arithmetic number, because the mean of its divisors is an integer number (101374434).

Almost surely, 2^395842987 is an apocalyptic number.

395842987 is a deficient number, since it is larger than the sum of its proper divisors (9654749).

395842987 is an equidigital number, since it uses as much as digits as its factorization.

395842987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9654748.

The product of its digits is 4354560, while the sum is 55.

The square root of 395842987 is about 19895.8032509371. The cubic root of 395842987 is about 734.2449784525.

The spelling of 395842987 in words is "three hundred ninety-five million, eight hundred forty-two thousand, nine hundred eighty-seven".