378798181 has 4 divisors (see below), whose sum is σ = 379173132. Its totient is φ = 378423232.

The previous prime is 378798169. The next prime is 378798191. The reversal of 378798181 is 181897873.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 181897873 = 13451 ⋅13523.

It can be written as a sum of positive squares in 2 ways, for example, as 66569281 + 312228900 = 8159^2 + 17670^2 .

It is a cyclic number.

It is not a de Polignac number, because 378798181 - 2¹¹ = 378796133 is a prime.

It is a super-2 number, since 2×378798181² = 286976123857817522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (378798191) 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, 185956 + ... + 187981.

It is an arithmetic number, because the mean of its divisors is an integer number (94793283).

Almost surely, 2^378798181 is an apocalyptic number.

It is an amenable number.

378798181 is a deficient number, since it is larger than the sum of its proper divisors (374951).

378798181 is a wasteful number, since it uses less digits than its factorization.

378798181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 374950.

The product of its digits is 677376, while the sum is 52.

The square root of 378798181 is about 19462.7382708600. The cubic root of 378798181 is about 723.5512446774.

The spelling of 378798181 in words is "three hundred seventy-eight million, seven hundred ninety-eight thousand, one hundred eighty-one".