1398308188469 has 4 divisors (see below), whose sum is σ = 1398312991296. Its totient is φ = 1398303385644.

The previous prime is 1398308188441. The next prime is 1398308188507. The reversal of 1398308188469 is 9648818038931.

It is a happy number.

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 1398308188469 - 2²⁸ = 1398039753013 is a prime.

It is a super-2 number, since 2×1398308188469² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1398308188399 and 1398308188408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1398308788469) 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, 1934429 + ... + 2557074.

It is an arithmetic number, because the mean of its divisors is an integer number (349578247824).

Almost surely, 2^{1398308188469} is an apocalyptic number.

It is an amenable number.

1398308188469 is a deficient number, since it is larger than the sum of its proper divisors (4802827).

1398308188469 is an equidigital number, since it uses as much as digits as its factorization.

1398308188469 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4802826.

The product of its (nonzero) digits is 71663616, while the sum is 68.

The spelling of 1398308188469 in words is "one trillion, three hundred ninety-eight billion, three hundred eight million, one hundred eighty-eight thousand, four hundred sixty-nine".