1927381120391 has 4 divisors (see below), whose sum is σ = 2040756480432. Its totient is φ = 1814005760352.

The previous prime is 1927381120367. The next prime is 1927381120429. The reversal of 1927381120391 is 1930211837291.

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 1927381120391 - 2³⁴ = 1910201251207 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 (1927381120891) 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, 56687679995 + ... + 56687680028.

It is an arithmetic number, because the mean of its divisors is an integer number (510189120108).

Almost surely, 2^{1927381120391} is an apocalyptic number.

1927381120391 is a deficient number, since it is larger than the sum of its proper divisors (113375360041).

1927381120391 is a wasteful number, since it uses less digits than its factorization.

1927381120391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113375360040.

The product of its (nonzero) digits is 163296, while the sum is 47.

The spelling of 1927381120391 in words is "one trillion, nine hundred twenty-seven billion, three hundred eighty-one million, one hundred twenty thousand, three hundred ninety-one".