389768237 has 2 divisors, whose sum is σ = 389768238. Its totient is φ = 389768236.

The previous prime is 389768233. The next prime is 389768251. The reversal of 389768237 is 732867983.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 378652681 + 11115556 = 19459^2 + 3334^2 .

It is a cyclic number.

It is not a de Polignac number, because 389768237 - 2² = 389768233 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (389768233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 194884118 + 194884119.

It is an arithmetic number, because the mean of its divisors is an integer number (194884119).

Almost surely, 2^389768237 is an apocalyptic number.

It is an amenable number.

389768237 is a deficient number, since it is larger than the sum of its proper divisors (1).

389768237 is an equidigital number, since it uses as much as digits as its factorization.

389768237 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3048192, while the sum is 53.

The square root of 389768237 is about 19742.5488982553. The cubic root of 389768237 is about 730.4696027665.

The spelling of 389768237 in words is "three hundred eighty-nine million, seven hundred sixty-eight thousand, two hundred thirty-seven".