981949 has 2 divisors, whose sum is σ = 981950. Its totient is φ = 981948.

The previous prime is 981947. The next prime is 981961. The reversal of 981949 is 949189.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 980100 + 1849 = 990^2 + 43^2 .

It is a cyclic number.

It is not a de Polignac number, because 981949 - 2¹ = 981947 is a prime.

Together with 981947, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (981941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 490974 + 490975.

It is an arithmetic number, because the mean of its divisors is an integer number (490975).

2⁹⁸¹⁹⁴⁹ is an apocalyptic number.

It is an amenable number.

981949 is a deficient number, since it is larger than the sum of its proper divisors (1).

981949 is an equidigital number, since it uses as much as digits as its factorization.

981949 is an evil number, because the sum of its binary digits is even.

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

The square root of 981949 is about 990.9333983674. The cubic root of 981949 is about 99.3946428214.

The spelling of 981949 in words is "nine hundred eighty-one thousand, nine hundred forty-nine".