388122793 has 2 divisors, whose sum is σ = 388122794. Its totient is φ = 388122792.

The previous prime is 388122751. The next prime is 388122811. The reversal of 388122793 is 397221883.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 386240409 + 1882384 = 19653^2 + 1372^2 .

It is an emirp because it is prime and its reverse (397221883) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-388122793 is a prime.

It is a super-2 number, since 2×388122793² = 301278604892241698, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (388120793) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 194061396 + 194061397.

It is an arithmetic number, because the mean of its divisors is an integer number (194061397).

Almost surely, 2^388122793 is an apocalyptic number.

It is an amenable number.

388122793 is a deficient number, since it is larger than the sum of its proper divisors (1).

388122793 is an equidigital number, since it uses as much as digits as its factorization.

388122793 is an evil number, because the sum of its binary digits is even.

The product of its digits is 145152, while the sum is 43.

The square root of 388122793 is about 19700.8322920632. The cubic root of 388122793 is about 729.4402370505.

The spelling of 388122793 in words is "three hundred eighty-eight million, one hundred twenty-two thousand, seven hundred ninety-three".