389500913 has 2 divisors, whose sum is σ = 389500914. Its totient is φ = 389500912.

The previous prime is 389500897. The next prime is 389500939. The reversal of 389500913 is 319005983.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 316021729 + 73479184 = 17777^2 + 8572^2 .

It is a cyclic number.

It is not a de Polignac number, because 389500913 - 2⁴ = 389500897 is a prime.

It is a super-2 number, since 2×389500913² = 303421922455667138, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (389500963) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 194750456 + 194750457.

It is an arithmetic number, because the mean of its divisors is an integer number (194750457).

Almost surely, 2^389500913 is an apocalyptic number.

It is an amenable number.

389500913 is a deficient number, since it is larger than the sum of its proper divisors (1).

389500913 is an equidigital number, since it uses as much as digits as its factorization.

389500913 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 29160, while the sum is 38.

The square root of 389500913 is about 19735.7774865851. Note that the first 3 decimals coincide. The cubic root of 389500913 is about 730.3025661387.

The spelling of 389500913 in words is "three hundred eighty-nine million, five hundred thousand, nine hundred thirteen".