1942009008391 has 8 divisors (see below), whose sum is σ = 2056361016240. Its totient is φ = 1827669909888.

The previous prime is 1942009008389. The next prime is 1942009008397. The reversal of 1942009008391 is 1938009002491.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1942009008391 - 2¹ = 1942009008389 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1942009008397) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2916756 + ... + 3520153.

It is an arithmetic number, because the mean of its divisors is an integer number (257045127030).

Almost surely, 2^{1942009008391} is an apocalyptic number.

1942009008391 is a deficient number, since it is larger than the sum of its proper divisors (114352007849).

1942009008391 is a wasteful number, since it uses less digits than its factorization.

1942009008391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6454673.

The product of its (nonzero) digits is 139968, while the sum is 46.

The spelling of 1942009008391 in words is "one trillion, nine hundred forty-two billion, nine million, eight thousand, three hundred ninety-one".