1378899959 has 8 divisors (see below), whose sum is σ = 1409054400. Its totient is φ = 1348779616.

The previous prime is 1378899953. The next prime is 1378899983. The reversal of 1378899959 is 9599988731.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1378899959 - 2⁴ = 1378899943 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1378899953) 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 7 ways as a sum of consecutive naturals, for example, 84077 + ... + 99129.

It is an arithmetic number, because the mean of its divisors is an integer number (176131800).

Almost surely, 2^1378899959 is an apocalyptic number.

1378899959 is a deficient number, since it is larger than the sum of its proper divisors (30154441).

1378899959 is a wasteful number, since it uses less digits than its factorization.

1378899959 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17049.

The product of its digits is 44089920, while the sum is 68.

The square root of 1378899959 is about 37133.5422360970. The cubic root of 1378899959 is about 1113.0403778687.

The spelling of 1378899959 in words is "one billion, three hundred seventy-eight million, eight hundred ninety-nine thousand, nine hundred fifty-nine".