378394531 has 4 divisors (see below), whose sum is σ = 378463192. Its totient is φ = 378325872.

The previous prime is 378394501. The next prime is 378394543. The reversal of 378394531 is 135493873.

It is a happy number.

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 378394531 - 2⁷ = 378394403 is a prime.

It is a super-2 number, since 2×378394531² = 286364842181419922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (378394501) 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, 25266 + ... + 37351.

It is an arithmetic number, because the mean of its divisors is an integer number (94615798).

Almost surely, 2^378394531 is an apocalyptic number.

378394531 is a deficient number, since it is larger than the sum of its proper divisors (68661).

378394531 is an equidigital number, since it uses as much as digits as its factorization.

378394531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68660.

The product of its digits is 272160, while the sum is 43.

The square root of 378394531 is about 19452.3656916068. The cubic root of 378394531 is about 723.2941462391.

The spelling of 378394531 in words is "three hundred seventy-eight million, three hundred ninety-four thousand, five hundred thirty-one".