381929429447 has 2 divisors, whose sum is σ = 381929429448. Its totient is φ = 381929429446.

The previous prime is 381929429383. The next prime is 381929429471. The reversal of 381929429447 is 744924929183.

It is a strong prime.

It is an emirp because it is prime and its reverse (744924929183) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 381929429447 - 2⁶ = 381929429383 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 381929429447.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (381929429477) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 190964714723 + 190964714724.

It is an arithmetic number, because the mean of its divisors is an integer number (190964714724).

Almost surely, 2^381929429447 is an apocalyptic number.

381929429447 is a deficient number, since it is larger than the sum of its proper divisors (1).

381929429447 is an equidigital number, since it uses as much as digits as its factorization.

381929429447 is an evil number, because the sum of its binary digits is even.

The product of its digits is 31352832, while the sum is 62.

The spelling of 381929429447 in words is "three hundred eighty-one billion, nine hundred twenty-nine million, four hundred twenty-nine thousand, four hundred forty-seven".