738378989 has 4 divisors (see below), whose sum is σ = 738482940. Its totient is φ = 738275040.

The previous prime is 738378967. The next prime is 738378997. The reversal of 738378989 is 989873837.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 550277764 + 188101225 = 23458^2 + 13715^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-738378989 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (738378089) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40472 + ... + 55809.

It is an arithmetic number, because the mean of its divisors is an integer number (184620735).

Almost surely, 2^738378989 is an apocalyptic number.

It is an amenable number.

738378989 is a deficient number, since it is larger than the sum of its proper divisors (103951).

738378989 is an equidigital number, since it uses as much as digits as its factorization.

738378989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103950.

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

The square root of 738378989 is about 27173.1299080544. The cubic root of 738378989 is about 903.8432313091.

The spelling of 738378989 in words is "seven hundred thirty-eight million, three hundred seventy-eight thousand, nine hundred eighty-nine".