989251 has 2 divisors, whose sum is σ = 989252. Its totient is φ = 989250.

The previous prime is 989249. The next prime is 989279. The reversal of 989251 is 152989.

It is a weak prime.

It is an emirp because it is prime and its reverse (152989) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 989251 - 2¹ = 989249 is a prime.

Together with 989249, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (989231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 494625 + 494626.

It is an arithmetic number, because the mean of its divisors is an integer number (494626).

2⁹⁸⁹²⁵¹ is an apocalyptic number.

989251 is a deficient number, since it is larger than the sum of its proper divisors (1).

989251 is an equidigital number, since it uses as much as digits as its factorization.

989251 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6480, while the sum is 34.

The square root of 989251 is about 994.6109792276. The cubic root of 989251 is about 99.6404084894.

The spelling of 989251 in words is "nine hundred eighty-nine thousand, two hundred fifty-one".