388961983 has 2 divisors, whose sum is σ = 388961984. Its totient is φ = 388961982.

The previous prime is 388961981. The next prime is 388962037. The reversal of 388961983 is 389169883.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (389169883) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 388961983 - 2¹ = 388961981 is a prime.

Together with 388961981, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (388961981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 194480991 + 194480992.

It is an arithmetic number, because the mean of its divisors is an integer number (194480992).

Almost surely, 2^388961983 is an apocalyptic number.

388961983 is a deficient number, since it is larger than the sum of its proper divisors (1).

388961983 is an equidigital number, since it uses as much as digits as its factorization.

388961983 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2239488, while the sum is 55.

The square root of 388961983 is about 19722.1191305600. The cubic root of 388961983 is about 729.9655847915.

The spelling of 388961983 in words is "three hundred eighty-eight million, nine hundred sixty-one thousand, nine hundred eighty-three".