378813191 has 4 divisors (see below), whose sum is σ = 379051992. Its totient is φ = 378574392.

The previous prime is 378813179. The next prime is 378813221. The reversal of 378813191 is 191318873.

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 378813191 - 2²² = 374618887 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 (378813131) 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, 117005 + ... + 120198.

It is an arithmetic number, because the mean of its divisors is an integer number (94762998).

Almost surely, 2^378813191 is an apocalyptic number.

378813191 is a deficient number, since it is larger than the sum of its proper divisors (238801).

378813191 is a wasteful number, since it uses less digits than its factorization.

378813191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 238800.

The product of its digits is 36288, while the sum is 41.

The square root of 378813191 is about 19463.1238756783. The cubic root of 378813191 is about 723.5608015349.

The spelling of 378813191 in words is "three hundred seventy-eight million, eight hundred thirteen thousand, one hundred ninety-one".