378876400117 has 2 divisors, whose sum is σ = 378876400118. Its totient is φ = 378876400116.

The previous prime is 378876400109. The next prime is 378876400151. The reversal of 378876400117 is 711004678873.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 345754584081 + 33121816036 = 588009^2 + 181994^2 .

It is an emirp because it is prime and its reverse (711004678873) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 378876400117 - 2³ = 378876400109 is a prime.

It is a super-4 number, since 4×378876400117⁴ (a number of 47 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (378876401117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 189438200058 + 189438200059.

It is an arithmetic number, because the mean of its divisors is an integer number (189438200059).

Almost surely, 2^378876400117 is an apocalyptic number.

It is an amenable number.

378876400117 is a deficient number, since it is larger than the sum of its proper divisors (1).

378876400117 is an equidigital number, since it uses as much as digits as its factorization.

378876400117 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1580544, while the sum is 52.

The spelling of 378876400117 in words is "three hundred seventy-eight billion, eight hundred seventy-six million, four hundred thousand, one hundred seventeen".