1398106746879 has 4 divisors (see below), whose sum is σ = 1864142329176. Its totient is φ = 932071164584.

The previous prime is 1398106746787. The next prime is 1398106746887. The reversal of 1398106746879 is 9786476018931.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 1398106746879 - 2¹⁵ = 1398106714111 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1398106746779) 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, 233017791144 + ... + 233017791149.

It is an arithmetic number, because the mean of its divisors is an integer number (466035582294).

Almost surely, 2^{1398106746879} is an apocalyptic number.

1398106746879 is a deficient number, since it is larger than the sum of its proper divisors (466035582297).

1398106746879 is an equidigital number, since it uses as much as digits as its factorization.

1398106746879 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 466035582296.

The product of its (nonzero) digits is 109734912, while the sum is 69.

The spelling of 1398106746879 in words is "one trillion, three hundred ninety-eight billion, one hundred six million, seven hundred forty-six thousand, eight hundred seventy-nine".