381929429477 has 2 divisors, whose sum is σ = 381929429478. Its totient is φ = 381929429476.

The previous prime is 381929429471. The next prime is 381929429501. The reversal of 381929429477 is 774924929183.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 381626182081 + 303247396 = 617759^2 + 17414^2 .

It is a cyclic number.

It is not a de Polignac number, because 381929429477 - 2¹⁰ = 381929428453 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (381929429471) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 190964714738 + 190964714739.

It is an arithmetic number, because the mean of its divisors is an integer number (190964714739).

Almost surely, 2^381929429477 is an apocalyptic number.

It is an amenable number.

381929429477 is a deficient number, since it is larger than the sum of its proper divisors (1).

381929429477 is an equidigital number, since it uses as much as digits as its factorization.

381929429477 is an evil number, because the sum of its binary digits is even.

The product of its digits is 54867456, while the sum is 65.

The spelling of 381929429477 in words is "three hundred eighty-one billion, nine hundred twenty-nine million, four hundred twenty-nine thousand, four hundred seventy-seven".