1398793916209 has 4 divisors (see below), whose sum is σ = 1398872031040. Its totient is φ = 1398715801380.

The previous prime is 1398793916203. The next prime is 1398793916237. The reversal of 1398793916209 is 9026193978931.

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 1398793916209 - 2³¹ = 1396646432561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1398793916203) 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, 39030549 + ... + 39066370.

It is an arithmetic number, because the mean of its divisors is an integer number (349718007760).

Almost surely, 2^{1398793916209} is an apocalyptic number.

It is an amenable number.

1398793916209 is a deficient number, since it is larger than the sum of its proper divisors (78114831).

1398793916209 is an equidigital number, since it uses as much as digits as its factorization.

1398793916209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78114830.

The product of its (nonzero) digits is 39680928, while the sum is 67.

The spelling of 1398793916209 in words is "one trillion, three hundred ninety-eight billion, seven hundred ninety-three million, nine hundred sixteen thousand, two hundred nine".