378517317 has 4 divisors (see below), whose sum is σ = 504689760. Its totient is φ = 252344876.

The previous prime is 378517283. The next prime is 378517319. The reversal of 378517317 is 713715873.

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 not a de Polignac number, because 378517317 - 2²² = 374323013 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (378517319) 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, 63086217 + ... + 63086222.

It is an arithmetic number, because the mean of its divisors is an integer number (126172440).

Almost surely, 2^378517317 is an apocalyptic number.

It is an amenable number.

378517317 is a deficient number, since it is larger than the sum of its proper divisors (126172443).

378517317 is a wasteful number, since it uses less digits than its factorization.

378517317 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126172442.

The product of its digits is 123480, while the sum is 42.

The square root of 378517317 is about 19455.5215041900. The cubic root of 378517317 is about 723.3723721677.

The spelling of 378517317 in words is "three hundred seventy-eight million, five hundred seventeen thousand, three hundred seventeen".