389678837 has 2 divisors, whose sum is σ = 389678838. Its totient is φ = 389678836.

The previous prime is 389678819. The next prime is 389678881. The reversal of 389678837 is 738876983.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 387853636 + 1825201 = 19694^2 + 1351^2 .

It is a cyclic number.

It is not a de Polignac number, because 389678837 - 2¹² = 389674741 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (389677837) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 194839418 + 194839419.

It is an arithmetic number, because the mean of its divisors is an integer number (194839419).

Almost surely, 2^389678837 is an apocalyptic number.

It is an amenable number.

389678837 is a deficient number, since it is larger than the sum of its proper divisors (1).

389678837 is an equidigital number, since it uses as much as digits as its factorization.

389678837 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12192768, while the sum is 59.

The square root of 389678837 is about 19740.2846230747. The cubic root of 389678837 is about 730.4137499376.

The spelling of 389678837 in words is "three hundred eighty-nine million, six hundred seventy-eight thousand, eight hundred thirty-seven".