388698676981 has 2 divisors, whose sum is σ = 388698676982. Its totient is φ = 388698676980.

The previous prime is 388698676921. The next prime is 388698677011. The reversal of 388698676981 is 189676896883.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 332225432100 + 56473244881 = 576390^2 + 237641^2 .

It is a cyclic number.

It is not a de Polignac number, because 388698676981 - 2¹³ = 388698668789 is a prime.

It is a super-2 number, since 2×388698676981² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (388698676921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 194349338490 + 194349338491.

It is an arithmetic number, because the mean of its divisors is an integer number (194349338491).

Almost surely, 2^388698676981 is an apocalyptic number.

It is an amenable number.

388698676981 is a deficient number, since it is larger than the sum of its proper divisors (1).

388698676981 is an equidigital number, since it uses as much as digits as its factorization.

388698676981 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1504935936, while the sum is 79.

The spelling of 388698676981 in words is "three hundred eighty-eight billion, six hundred ninety-eight million, six hundred seventy-six thousand, nine hundred eighty-one".