395723987 has 4 divisors (see below), whose sum is σ = 396484056. Its totient is φ = 394963920.

The previous prime is 395723983. The next prime is 395724041. The reversal of 395723987 is 789327593.

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

It is a cyclic number.

It is not a de Polignac number, because 395723987 - 2² = 395723983 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (395723983) 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, 379253 + ... + 380294.

It is an arithmetic number, because the mean of its divisors is an integer number (99121014).

Almost surely, 2^395723987 is an apocalyptic number.

395723987 is a deficient number, since it is larger than the sum of its proper divisors (760069).

395723987 is an equidigital number, since it uses as much as digits as its factorization.

395723987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 760068.

The product of its digits is 2857680, while the sum is 53.

The square root of 395723987 is about 19892.8124457051. The cubic root of 395723987 is about 734.1713937969.

The spelling of 395723987 in words is "three hundred ninety-five million, seven hundred twenty-three thousand, nine hundred eighty-seven".