378763989 has 4 divisors (see below), whose sum is σ = 505018656. Its totient is φ = 252509324.

The previous prime is 378763967. The next prime is 378763997. The reversal of 378763989 is 989367873.

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 378763989 - 2⁹ = 378763477 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (378763919) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 63127329 + ... + 63127334.

It is an arithmetic number, because the mean of its divisors is an integer number (126254664).

Almost surely, 2^378763989 is an apocalyptic number.

It is an amenable number.

378763989 is a deficient number, since it is larger than the sum of its proper divisors (126254667).

378763989 is a wasteful number, since it uses less digits than its factorization.

378763989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126254666.

The product of its digits is 13716864, while the sum is 60.

The square root of 378763989 is about 19461.8598545977. The cubic root of 378763989 is about 723.5294737100.

It can be divided in two parts, 3787 and 63989, that added together give a palindrome (67776).

The spelling of 378763989 in words is "three hundred seventy-eight million, seven hundred sixty-three thousand, nine hundred eighty-nine".