378198913 has 4 divisors (see below), whose sum is σ = 394642368. Its totient is φ = 361755460.

The previous prime is 378198901. The next prime is 378198929. The reversal of 378198913 is 319891873.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 378198913 - 2²⁵ = 344644481 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (378198973) 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, 8221693 + ... + 8221738.

It is an arithmetic number, because the mean of its divisors is an integer number (98660592).

Almost surely, 2^378198913 is an apocalyptic number.

It is an amenable number.

378198913 is a deficient number, since it is larger than the sum of its proper divisors (16443455).

378198913 is a wasteful number, since it uses less digits than its factorization.

378198913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16443454.

The product of its digits is 326592, while the sum is 49.

The square root of 378198913 is about 19447.3369128012. The cubic root of 378198913 is about 723.1694846919.

The spelling of 378198913 in words is "three hundred seventy-eight million, one hundred ninety-eight thousand, nine hundred thirteen".