388977983 has 2 divisors, whose sum is σ = 388977984. Its totient is φ = 388977982.

The previous prime is 388977959. The next prime is 388977989. The reversal of 388977983 is 389779883.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 388977983 - 2²⁴ = 372200767 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (388977989) 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, 194488991 + 194488992.

It is an arithmetic number, because the mean of its divisors is an integer number (194488992).

Almost surely, 2^388977983 is an apocalyptic number.

388977983 is a deficient number, since it is larger than the sum of its proper divisors (1).

388977983 is an equidigital number, since it uses as much as digits as its factorization.

388977983 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18289152, while the sum is 62.

The square root of 388977983 is about 19722.5247623117. The cubic root of 388977983 is about 729.9755937296.

The spelling of 388977983 in words is "three hundred eighty-eight million, nine hundred seventy-seven thousand, nine hundred eighty-three".