378559959 has 4 divisors (see below), whose sum is σ = 504746616. Its totient is φ = 252373304.

The previous prime is 378559919. The next prime is 378559963. The reversal of 378559959 is 959955873.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 959955873 = 3 ⋅319985291.

It is a cyclic number.

It is not a de Polignac number, because 378559959 - 2¹¹ = 378557911 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (378559919) 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, 63093324 + ... + 63093329.

It is an arithmetic number, because the mean of its divisors is an integer number (126186654).

Almost surely, 2^378559959 is an apocalyptic number.

378559959 is a deficient number, since it is larger than the sum of its proper divisors (126186657).

378559959 is a wasteful number, since it uses less digits than its factorization.

378559959 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126186656.

The product of its digits is 15309000, while the sum is 60.

The square root of 378559959 is about 19456.6173575984. The cubic root of 378559959 is about 723.3995350698.

The spelling of 378559959 in words is "three hundred seventy-eight million, five hundred fifty-nine thousand, nine hundred fifty-nine".