1396634441893 has 4 divisors (see below), whose sum is σ = 1396719447948. Its totient is φ = 1396549435840.

The previous prime is 1396634441857. The next prime is 1396634441897. The reversal of 1396634441893 is 3981444366931.

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

It can be written as a sum of positive squares in 2 ways, for example, as 952542816289 + 444091625604 = 975983^2 + 666402^2 .

It is a cyclic number.

It is not a de Polignac number, because 1396634441893 - 2⁹ = 1396634441381 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 (1396634441897) 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, 42478378 + ... + 42511243.

It is an arithmetic number, because the mean of its divisors is an integer number (349179861987).

Almost surely, 2^{1396634441893} is an apocalyptic number.

It is an amenable number.

1396634441893 is a deficient number, since it is larger than the sum of its proper divisors (85006055).

1396634441893 is an equidigital number, since it uses as much as digits as its factorization.

1396634441893 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85006054.

The product of its digits is 40310784, while the sum is 61.

The spelling of 1396634441893 in words is "one trillion, three hundred ninety-six billion, six hundred thirty-four million, four hundred forty-one thousand, eight hundred ninety-three".