378878317 has 4 divisors (see below), whose sum is σ = 383443200. Its totient is φ = 374313436.

The previous prime is 378878299. The next prime is 378878363. The reversal of 378878317 is 713878873.

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 a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-378878317 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (378878917) 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, 2282317 + ... + 2282482.

It is an arithmetic number, because the mean of its divisors is an integer number (95860800).

Almost surely, 2^378878317 is an apocalyptic number.

It is an amenable number.

378878317 is a deficient number, since it is larger than the sum of its proper divisors (4564883).

378878317 is an equidigital number, since it uses as much as digits as its factorization.

378878317 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4564882.

The product of its digits is 1580544, while the sum is 52.

The square root of 378878317 is about 19464.7968651101. The cubic root of 378878317 is about 723.6022642943.

The spelling of 378878317 in words is "three hundred seventy-eight million, eight hundred seventy-eight thousand, three hundred seventeen".