378521279 has 4 divisors (see below), whose sum is σ = 383706576. Its totient is φ = 373335984.

The previous prime is 378521263. The next prime is 378521291. The reversal of 378521279 is 972125873.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 378521279 - 2⁴ = 378521263 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 (378521179) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2592539 + ... + 2592684.

It is an arithmetic number, because the mean of its divisors is an integer number (95926644).

Almost surely, 2^378521279 is an apocalyptic number.

378521279 is a deficient number, since it is larger than the sum of its proper divisors (5185297).

378521279 is an equidigital number, since it uses as much as digits as its factorization.

378521279 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5185296.

The product of its digits is 211680, while the sum is 44.

The square root of 378521279 is about 19455.6233259179. The cubic root of 378521279 is about 723.3748960429.

The spelling of 378521279 in words is "three hundred seventy-eight million, five hundred twenty-one thousand, two hundred seventy-nine".