1044340242391 has 2 divisors, whose sum is σ = 1044340242392. Its totient is φ = 1044340242390.

The previous prime is 1044340242377. The next prime is 1044340242437. The reversal of 1044340242391 is 1932420434401.

It is a weak prime.

It is an emirp because it is prime and its reverse (1932420434401) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1044340242391 - 2⁷ = 1044340242263 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1044340242391.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1044340242331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 522170121195 + 522170121196.

It is an arithmetic number, because the mean of its divisors is an integer number (522170121196).

Almost surely, 2^{1044340242391} is an apocalyptic number.

1044340242391 is a deficient number, since it is larger than the sum of its proper divisors (1).

1044340242391 is an equidigital number, since it uses as much as digits as its factorization.

1044340242391 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 82944, while the sum is 37.

Adding to 1044340242391 its reverse (1932420434401), we get a palindrome (2976760676792).

The spelling of 1044340242391 in words is "one trillion, forty-four billion, three hundred forty million, two hundred forty-two thousand, three hundred ninety-one".