940036402391 has 2 divisors, whose sum is σ = 940036402392. Its totient is φ = 940036402390.

The previous prime is 940036402381. The next prime is 940036402421. The reversal of 940036402391 is 193204630049.

It is a weak prime.

It is an emirp because it is prime and its reverse (193204630049) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-940036402391 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (940036402381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 470018201195 + 470018201196.

It is an arithmetic number, because the mean of its divisors is an integer number (470018201196).

Almost surely, 2^940036402391 is an apocalyptic number.

940036402391 is a deficient number, since it is larger than the sum of its proper divisors (1).

940036402391 is an equidigital number, since it uses as much as digits as its factorization.

940036402391 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 139968, while the sum is 41.

The spelling of 940036402391 in words is "nine hundred forty billion, thirty-six million, four hundred two thousand, three hundred ninety-one".