388085947 has 2 divisors, whose sum is σ = 388085948. Its totient is φ = 388085946.

The previous prime is 388085921. The next prime is 388085959. The reversal of 388085947 is 749580883.

It is a strong prime.

It is an emirp because it is prime and its reverse (749580883) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 388085947 - 2¹⁵ = 388053179 is a prime.

It is a super-2 number, since 2×388085947² = 301221404517773618, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 388085894 and 388085903.

It is not a weakly prime, because it can be changed into another prime (388085977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 194042973 + 194042974.

It is an arithmetic number, because the mean of its divisors is an integer number (194042974).

Almost surely, 2^388085947 is an apocalyptic number.

388085947 is a deficient number, since it is larger than the sum of its proper divisors (1).

388085947 is an equidigital number, since it uses as much as digits as its factorization.

388085947 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1935360, while the sum is 52.

The square root of 388085947 is about 19699.8971317111. The cubic root of 388085947 is about 729.4171534577.

The spelling of 388085947 in words is "three hundred eighty-eight million, eighty-five thousand, nine hundred forty-seven".