918949 has 2 divisors, whose sum is σ = 918950. Its totient is φ = 918948.

The previous prime is 918947. The next prime is 918959. The reversal of 918949 is 949819.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 624100 + 294849 = 790^2 + 543^2 .

It is a cyclic number.

It is not a de Polignac number, because 918949 - 2¹ = 918947 is a prime.

Together with 918947, it forms a pair of twin primes.

918949 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (918943) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 459474 + 459475.

It is an arithmetic number, because the mean of its divisors is an integer number (459475).

2⁹¹⁸⁹⁴⁹ is an apocalyptic number.

It is an amenable number.

918949 is a deficient number, since it is larger than the sum of its proper divisors (1).

918949 is an equidigital number, since it uses as much as digits as its factorization.

918949 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 23328, while the sum is 40.

The square root of 918949 is about 958.6182764792. The cubic root of 918949 is about 97.2218326092.

The spelling of 918949 in words is "nine hundred eighteen thousand, nine hundred forty-nine".