1398009329 has 4 divisors (see below), whose sum is σ = 1398758400. Its totient is φ = 1397260260.

The previous prime is 1398009311. The next prime is 1398009343. The reversal of 1398009329 is 9239008931.

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 a de Polignac number, because none of the positive numbers 2^k-1398009329 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1398009329.

It is not an unprimeable number, because it can be changed into a prime (1398009629) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 371729 + ... + 375470.

It is an arithmetic number, because the mean of its divisors is an integer number (349689600).

Almost surely, 2^1398009329 is an apocalyptic number.

It is an amenable number.

1398009329 is a deficient number, since it is larger than the sum of its proper divisors (749071).

1398009329 is an equidigital number, since it uses as much as digits as its factorization.

1398009329 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 749070.

The product of its (nonzero) digits is 104976, while the sum is 44.

The square root of 1398009329 is about 37389.9629446192. The cubic root of 1398009329 is about 1118.1584663739.

The spelling of 1398009329 in words is "one billion, three hundred ninety-eight million, nine thousand, three hundred twenty-nine".