388775971 has 2 divisors, whose sum is σ = 388775972. Its totient is φ = 388775970.

The previous prime is 388775953. The next prime is 388775993. The reversal of 388775971 is 179577883.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 388775971 - 2⁷ = 388775843 is a prime.

It is a super-2 number, since 2×388775971² = 302293511253985682, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (388775671) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 194387985 + 194387986.

It is an arithmetic number, because the mean of its divisors is an integer number (194387986).

Almost surely, 2^388775971 is an apocalyptic number.

388775971 is a deficient number, since it is larger than the sum of its proper divisors (1).

388775971 is an equidigital number, since it uses as much as digits as its factorization.

388775971 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2963520, while the sum is 55.

The square root of 388775971 is about 19717.4027447836. The cubic root of 388775971 is about 729.8492032298.

The spelling of 388775971 in words is "three hundred eighty-eight million, seven hundred seventy-five thousand, nine hundred seventy-one".