389884433 has 2 divisors, whose sum is σ = 389884434. Its totient is φ = 389884432.

The previous prime is 389884387. The next prime is 389884441. The reversal of 389884433 is 334488983.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 358837249 + 31047184 = 18943^2 + 5572^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-389884433 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (389884463) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 194942216 + 194942217.

It is an arithmetic number, because the mean of its divisors is an integer number (194942217).

Almost surely, 2^389884433 is an apocalyptic number.

It is an amenable number.

389884433 is a deficient number, since it is larger than the sum of its proper divisors (1).

389884433 is an equidigital number, since it uses as much as digits as its factorization.

389884433 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1990656, while the sum is 50.

The square root of 389884433 is about 19745.4914600777. The cubic root of 389884433 is about 730.5421836876.

The spelling of 389884433 in words is "three hundred eighty-nine million, eight hundred eighty-four thousand, four hundred thirty-three".