388976641 has 2 divisors, whose sum is σ = 388976642. Its totient is φ = 388976640.

The previous prime is 388976633. The next prime is 388976659. The reversal of 388976641 is 146679883.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 373610241 + 15366400 = 19329^2 + 3920^2 .

It is a cyclic number.

It is not a de Polignac number, because 388976641 - 2³ = 388976633 is a prime.

It is not a weakly prime, because it can be changed into another prime (388976041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 194488320 + 194488321.

It is an arithmetic number, because the mean of its divisors is an integer number (194488321).

Almost surely, 2^388976641 is an apocalyptic number.

It is an amenable number.

388976641 is a deficient number, since it is larger than the sum of its proper divisors (1).

388976641 is an equidigital number, since it uses as much as digits as its factorization.

388976641 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1741824, while the sum is 52.

The square root of 388976641 is about 19722.4907402691. The cubic root of 388976641 is about 729.9747542405.

The spelling of 388976641 in words is "three hundred eighty-eight million, nine hundred seventy-six thousand, six hundred forty-one".