378669 has 4 divisors (see below), whose sum is σ = 504896. Its totient is φ = 252444.

The previous prime is 378667. The next prime is 378671. The reversal of 378669 is 966873.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (378667) and next prime (378671).

It is not a de Polignac number, because 378669 - 2¹ = 378667 is a prime.

It is a super-2 number, since 2×378669² = 286780423122, which contains 22 as substring.

It is a D-number.

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 378669.

It is not an unprimeable number, because it can be changed into a prime (378661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 63109 + ... + 63114.

It is an arithmetic number, because the mean of its divisors is an integer number (126224).

2³⁷⁸⁶⁶⁹ is an apocalyptic number.

It is an amenable number.

378669 is a deficient number, since it is larger than the sum of its proper divisors (126227).

378669 is a wasteful number, since it uses less digits than its factorization.

378669 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126226.

The product of its digits is 54432, while the sum is 39.

The square root of 378669 is about 615.3608697342. The cubic root of 378669 is about 72.3468984778.

The spelling of 378669 in words is "three hundred seventy-eight thousand, six hundred sixty-nine".