378971397 has 48 divisors (see below), whose sum is σ = 667704960. Its totient is φ = 202300416.

The previous prime is 378971393. The next prime is 378971419. The reversal of 378971397 is 793179873.

It is a happy number.

It is not a de Polignac number, because 378971397 - 2² = 378971393 is a prime.

It is a zygodrome in base 4.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (378971393) 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 47 ways as a sum of consecutive naturals, for example, 85213 + ... + 89549.

It is an arithmetic number, because the mean of its divisors is an integer number (13910520).

Almost surely, 2^378971397 is an apocalyptic number.

It is an amenable number.

378971397 is a deficient number, since it is larger than the sum of its proper divisors (288733563).

378971397 is a wasteful number, since it uses less digits than its factorization.

378971397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4442 (or 4439 counting only the distinct ones).

The product of its digits is 2000376, while the sum is 54.

The square root of 378971397 is about 19467.1877013605. The cubic root of 378971397 is about 723.6615158455.

The spelling of 378971397 in words is "three hundred seventy-eight million, nine hundred seventy-one thousand, three hundred ninety-seven".