388380739 has 2 divisors, whose sum is σ = 388380740. Its totient is φ = 388380738.

The previous prime is 388380719. The next prime is 388380763. The reversal of 388380739 is 937083883.

It is a weak prime.

It is an emirp because it is prime and its reverse (937083883) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 388380739 - 2⁷ = 388380611 is a prime.

It is a super-2 number, since 2×388380739² = 301679196852372242, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 388380692 and 388380701.

It is not a weakly prime, because it can be changed into another prime (388380719) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 194190369 + 194190370.

It is an arithmetic number, because the mean of its divisors is an integer number (194190370).

Almost surely, 2^388380739 is an apocalyptic number.

388380739 is a deficient number, since it is larger than the sum of its proper divisors (1).

388380739 is an equidigital number, since it uses as much as digits as its factorization.

388380739 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 870912, while the sum is 49.

The square root of 388380739 is about 19707.3777809226. The cubic root of 388380739 is about 729.6017963366.

The spelling of 388380739 in words is "three hundred eighty-eight million, three hundred eighty thousand, seven hundred thirty-nine".