378989873 has 4 divisors (see below), whose sum is σ = 379276800. Its totient is φ = 378702948.

The previous prime is 378989801. The next prime is 378989879.

378989873 is nontrivially palindromic in base 10.

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 378989873 - 2²⁴ = 362212657 is a prime.

It is a super-2 number, since 2×378989873² = 287266647673112258, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (378989879) 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, 141473 + ... + 144126.

It is an arithmetic number, because the mean of its divisors is an integer number (94819200).

Almost surely, 2^378989873 is an apocalyptic number.

It is an amenable number.

378989873 is a deficient number, since it is larger than the sum of its proper divisors (286927).

378989873 is a wasteful number, since it uses less digits than its factorization.

378989873 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 286926.

The product of its digits is 18289152, while the sum is 62.

The square root of 378989873 is about 19467.6622376699. The cubic root of 378989873 is about 723.6732758824.

The spelling of 378989873 in words is "three hundred seventy-eight million, nine hundred eighty-nine thousand, eight hundred seventy-three".