378372169 has 18 divisors (see below), whose sum is σ = 444456474. Its totient is φ = 321168960.

The previous prime is 378372167. The next prime is 378372221. The reversal of 378372169 is 961273873.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 353252025 + 25120144 = 18795^2 + 5012^2 .

It is not a de Polignac number, because 378372169 - 2¹ = 378372167 is a prime.

It is a super-2 number, since 2×378372169² = 286330996547529122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (378372167) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 1569889 + ... + 1570129.

Almost surely, 2^378372169 is an apocalyptic number.

It is an amenable number.

378372169 is a deficient number, since it is larger than the sum of its proper divisors (66084305).

378372169 is an equidigital number, since it uses as much as digits as its factorization.

378372169 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 613 (or 427 counting only the distinct ones).

The product of its digits is 381024, while the sum is 46.

The square root of 378372169 is about 19451.7908944138. The cubic root of 378372169 is about 723.2798977753.

The spelling of 378372169 in words is "three hundred seventy-eight million, three hundred seventy-two thousand, one hundred sixty-nine".