389500973 has 2 divisors, whose sum is σ = 389500974. Its totient is φ = 389500972.

The previous prime is 389500967. The next prime is 389500987. The reversal of 389500973 is 379005983.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 384669769 + 4831204 = 19613^2 + 2198^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-389500973 is a prime.

It is a super-2 number, since 2×389500973² = 303422015935893458, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (389500913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 194750486 + 194750487.

It is an arithmetic number, because the mean of its divisors is an integer number (194750487).

Almost surely, 2^389500973 is an apocalyptic number.

It is an amenable number.

389500973 is a deficient number, since it is larger than the sum of its proper divisors (1).

389500973 is an equidigital number, since it uses as much as digits as its factorization.

389500973 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 204120, while the sum is 44.

The square root of 389500973 is about 19735.7790066671. The cubic root of 389500973 is about 730.3026036381.

The spelling of 389500973 in words is "three hundred eighty-nine million, five hundred thousand, nine hundred seventy-three".