993000389 has 2 divisors, whose sum is σ = 993000390. Its totient is φ = 993000388.

The previous prime is 993000383. The next prime is 993000431. The reversal of 993000389 is 983000399.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 618268225 + 374732164 = 24865^2 + 19358^2 .

It is an emirp because it is prime and its reverse (983000399) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 993000389 - 2¹² = 992996293 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (993000383) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 496500194 + 496500195.

It is an arithmetic number, because the mean of its divisors is an integer number (496500195).

Almost surely, 2^993000389 is an apocalyptic number.

It is an amenable number.

993000389 is a deficient number, since it is larger than the sum of its proper divisors (1).

993000389 is an equidigital number, since it uses as much as digits as its factorization.

993000389 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 52488, while the sum is 41.

The square root of 993000389 is about 31511.9086854478. The cubic root of 993000389 is about 997.6613312254.

The spelling of 993000389 in words is "nine hundred ninety-three million, three hundred eighty-nine", and thus it is an aban number.