389318593 has 2 divisors, whose sum is σ = 389318594. Its totient is φ = 389318592.

The previous prime is 389318543. The next prime is 389318617. The reversal of 389318593 is 395813983.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 389193984 + 124609 = 19728^2 + 353^2 .

It is a cyclic number.

It is not a de Polignac number, because 389318593 - 2²¹ = 387221441 is a prime.

It is not a weakly prime, because it can be changed into another prime (389318543) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 194659296 + 194659297.

It is an arithmetic number, because the mean of its divisors is an integer number (194659297).

Almost surely, 2^389318593 is an apocalyptic number.

It is an amenable number.

389318593 is a deficient number, since it is larger than the sum of its proper divisors (1).

389318593 is an equidigital number, since it uses as much as digits as its factorization.

389318593 is an evil number, because the sum of its binary digits is even.

The product of its digits is 699840, while the sum is 49.

The square root of 389318593 is about 19731.1579234469. The cubic root of 389318593 is about 730.1886001720.

It can be divided in two parts, 38931 and 8593, that added together give a square (47524 = 218²).

The spelling of 389318593 in words is "three hundred eighty-nine million, three hundred eighteen thousand, five hundred ninety-three".