385168987 has 4 divisors (see below), whose sum is σ = 440193136. Its totient is φ = 330144840.

The previous prime is 385168963. The next prime is 385168999. The reversal of 385168987 is 789861583.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 789861583 = 7 ⋅112837369.

It is a cyclic number.

It is not a de Polignac number, because 385168987 - 2⁷ = 385168859 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (385168907) 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, 27512064 + ... + 27512077.

It is an arithmetic number, because the mean of its divisors is an integer number (110048284).

Almost surely, 2^385168987 is an apocalyptic number.

385168987 is a deficient number, since it is larger than the sum of its proper divisors (55024149).

385168987 is an equidigital number, since it uses as much as digits as its factorization.

385168987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55024148.

The product of its digits is 2903040, while the sum is 55.

The square root of 385168987 is about 19625.7225854234. The cubic root of 385168987 is about 727.5850560480.

The spelling of 385168987 in words is "three hundred eighty-five million, one hundred sixty-eight thousand, nine hundred eighty-seven".