378478313 has 4 divisors (see below), whose sum is σ = 378521088. Its totient is φ = 378435540.

The previous prime is 378478301. The next prime is 378478319. The reversal of 378478313 is 313874873.

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, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 313874873 = 13 ⋅24144221.

It is a cyclic number.

It is not a de Polignac number, because 378478313 - 2¹⁴ = 378461929 is a prime.

It is a super-2 number, since 2×378478313² = 286491666822651938, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (378478319) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2633 + ... + 27638.

It is an arithmetic number, because the mean of its divisors is an integer number (94630272).

Almost surely, 2^378478313 is an apocalyptic number.

It is an amenable number.

378478313 is a deficient number, since it is larger than the sum of its proper divisors (42775).

378478313 is a wasteful number, since it uses less digits than its factorization.

378478313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42774.

The product of its digits is 338688, while the sum is 44.

The square root of 378478313 is about 19454.5190894044. The cubic root of 378478313 is about 723.3475248808.

The spelling of 378478313 in words is "three hundred seventy-eight million, four hundred seventy-eight thousand, three hundred thirteen".