388039247 has 2 divisors, whose sum is σ = 388039248. Its totient is φ = 388039246.

The previous prime is 388039241. The next prime is 388039319. The reversal of 388039247 is 742930883.

It is a weak prime.

It is an emirp because it is prime and its reverse (742930883) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 388039247 - 2¹⁰ = 388038223 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 388039198 and 388039207.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (388039241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 194019623 + 194019624.

It is an arithmetic number, because the mean of its divisors is an integer number (194019624).

Almost surely, 2^388039247 is an apocalyptic number.

388039247 is a deficient number, since it is larger than the sum of its proper divisors (1).

388039247 is an equidigital number, since it uses as much as digits as its factorization.

388039247 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 290304, while the sum is 44.

The square root of 388039247 is about 19698.7118106743. The cubic root of 388039247 is about 729.3878943484.

The spelling of 388039247 in words is "three hundred eighty-eight million, thirty-nine thousand, two hundred forty-seven".