388109641 has 2 divisors, whose sum is σ = 388109642. Its totient is φ = 388109640.

The previous prime is 388109563. The next prime is 388109653. The reversal of 388109641 is 146901883.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 368793616 + 19316025 = 19204^2 + 4395^2 .

It is a cyclic number.

It is not a de Polignac number, because 388109641 - 2¹⁹ = 387585353 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 388109594 and 388109603.

It is not a weakly prime, because it can be changed into another prime (388109341) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 194054820 + 194054821.

It is an arithmetic number, because the mean of its divisors is an integer number (194054821).

Almost surely, 2^388109641 is an apocalyptic number.

It is an amenable number.

388109641 is a deficient number, since it is larger than the sum of its proper divisors (1).

388109641 is an equidigital number, since it uses as much as digits as its factorization.

388109641 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 41472, while the sum is 40.

The square root of 388109641 is about 19700.4984962310. The cubic root of 388109641 is about 729.4319976424.

The spelling of 388109641 in words is "three hundred eighty-eight million, one hundred nine thousand, six hundred forty-one".