388916093 has 2 divisors, whose sum is σ = 388916094. Its totient is φ = 388916092.

The previous prime is 388916069. The next prime is 388916107. The reversal of 388916093 is 390619883.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 350513284 + 38402809 = 18722^2 + 6197^2 .

It is a cyclic number.

It is not a de Polignac number, because 388916093 - 2⁶ = 388916029 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (388916393) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 194458046 + 194458047.

It is an arithmetic number, because the mean of its divisors is an integer number (194458047).

Almost surely, 2^388916093 is an apocalyptic number.

It is an amenable number.

388916093 is a deficient number, since it is larger than the sum of its proper divisors (1).

388916093 is an equidigital number, since it uses as much as digits as its factorization.

388916093 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 279936, while the sum is 47.

The square root of 388916093 is about 19720.9556817108. The cubic root of 388916093 is about 729.9368763833.

The spelling of 388916093 in words is "three hundred eighty-eight million, nine hundred sixteen thousand, ninety-three".