378880129 has 4 divisors (see below), whose sum is σ = 383676160. Its totient is φ = 374084100.

The previous prime is 378880087. The next prime is 378880133. The reversal of 378880129 is 921088873.

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, and also an emirpimes, since its reverse is a distinct semiprime: 921088873 = 283 ⋅3254731.

It is a cyclic number.

It is not a de Polignac number, because 378880129 - 2¹⁵ = 378847361 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (378887129) 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, 2397897 + ... + 2398054.

It is an arithmetic number, because the mean of its divisors is an integer number (95919040).

Almost surely, 2^378880129 is an apocalyptic number.

It is an amenable number.

378880129 is a deficient number, since it is larger than the sum of its proper divisors (4796031).

378880129 is an equidigital number, since it uses as much as digits as its factorization.

378880129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4796030.

The product of its (nonzero) digits is 193536, while the sum is 46.

The square root of 378880129 is about 19464.8434106211. The cubic root of 378880129 is about 723.6034178443.

The spelling of 378880129 in words is "three hundred seventy-eight million, eight hundred eighty thousand, one hundred twenty-nine".