989870837 has 2 divisors, whose sum is σ = 989870838. Its totient is φ = 989870836.

The previous prime is 989870813. The next prime is 989870863. The reversal of 989870837 is 738078989.

989870837 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 619462321 + 370408516 = 24889^2 + 19246^2 .

It is an emirp because it is prime and its reverse (738078989) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 989870837 - 2¹⁰ = 989869813 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (989870887) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 494935418 + 494935419.

It is an arithmetic number, because the mean of its divisors is an integer number (494935419).

Almost surely, 2^989870837 is an apocalyptic number.

It is an amenable number.

989870837 is a deficient number, since it is larger than the sum of its proper divisors (1).

989870837 is an equidigital number, since it uses as much as digits as its factorization.

989870837 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6096384, while the sum is 59.

The square root of 989870837 is about 31462.2128433459. The cubic root of 989870837 is about 996.6121477519.

The spelling of 989870837 in words is "nine hundred eighty-nine million, eight hundred seventy thousand, eight hundred thirty-seven".