1093728456391 has 4 divisors (see below), whose sum is σ = 1158065424432. Its totient is φ = 1029391488352.

The previous prime is 1093728456349. The next prime is 1093728456407. The reversal of 1093728456391 is 1936548273901.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1093728456391 is a prime.

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1093728456791) 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, 32168483995 + ... + 32168484028.

It is an arithmetic number, because the mean of its divisors is an integer number (289516356108).

It is a 1-persistent number, because it is pandigital, but 2⋅1093728456391 = 2187456912782 is not.

Almost surely, 2^{1093728456391} is an apocalyptic number.

1093728456391 is a deficient number, since it is larger than the sum of its proper divisors (64336968041).

1093728456391 is an equidigital number, since it uses as much as digits as its factorization.

1093728456391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64336968040.

The product of its (nonzero) digits is 9797760, while the sum is 58.

The spelling of 1093728456391 in words is "one trillion, ninety-three billion, seven hundred twenty-eight million, four hundred fifty-six thousand, three hundred ninety-one".