989838287 has 2 divisors, whose sum is σ = 989838288. Its totient is φ = 989838286.

The previous prime is 989838271. The next prime is 989838299. The reversal of 989838287 is 782838989.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 989838287 - 2⁴ = 989838271 is a prime.

It is a super-2 number, since 2×989838287² = 1959559668822188738, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (989838217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 494919143 + 494919144.

It is an arithmetic number, because the mean of its divisors is an integer number (494919144).

Almost surely, 2^989838287 is an apocalyptic number.

989838287 is a deficient number, since it is larger than the sum of its proper divisors (1).

989838287 is an equidigital number, since it uses as much as digits as its factorization.

989838287 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13934592, while the sum is 62.

The square root of 989838287 is about 31461.6955518929. The cubic root of 989838287 is about 996.6012237405.

The spelling of 989838287 in words is "nine hundred eighty-nine million, eight hundred thirty-eight thousand, two hundred eighty-seven".