378687 has 4 divisors (see below), whose sum is σ = 504920. Its totient is φ = 252456.

The previous prime is 378683. The next prime is 378691. The reversal of 378687 is 786873.

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

It is an interprime number because it is at equal distance from previous prime (378683) and next prime (378691).

It is not a de Polignac number, because 378687 - 2² = 378683 is a prime.

It is a D-number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (378683) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 63112 + ... + 63117.

It is an arithmetic number, because the mean of its divisors is an integer number (126230).

2³⁷⁸⁶⁸⁷ is an apocalyptic number.

378687 is a deficient number, since it is larger than the sum of its proper divisors (126233).

378687 is a wasteful number, since it uses less digits than its factorization.

378687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126232.

The product of its digits is 56448, while the sum is 39.

The square root of 378687 is about 615.3754951247. The cubic root of 378687 is about 72.3480447943.

The spelling of 378687 in words is "three hundred seventy-eight thousand, six hundred eighty-seven".