1934855949391 has 2 divisors, whose sum is σ = 1934855949392. Its totient is φ = 1934855949390.

The previous prime is 1934855949349. The next prime is 1934855949413. The reversal of 1934855949391 is 1939495584391.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1934855949391 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1934855949391.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1934855946391) 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, 967427974695 + 967427974696.

It is an arithmetic number, because the mean of its divisors is an integer number (967427974696).

Almost surely, 2^{1934855949391} is an apocalyptic number.

1934855949391 is a deficient number, since it is larger than the sum of its proper divisors (1).

1934855949391 is an equidigital number, since it uses as much as digits as its factorization.

1934855949391 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 188956800, while the sum is 70.

The spelling of 1934855949391 in words is "one trillion, nine hundred thirty-four billion, eight hundred fifty-five million, nine hundred forty-nine thousand, three hundred ninety-one".