981938 has 4 divisors (see below), whose sum is σ = 1472910. Its totient is φ = 490968.

The previous prime is 981919. The next prime is 981941. The reversal of 981938 is 839189.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 839189 = 13 ⋅64553.

It can be written as a sum of positive squares in only one way, i.e., 744769 + 237169 = 863^2 + 487^2 .

It is a Curzon number.

It is an unprimeable number.

981938 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 245483 + ... + 245486.

2⁹⁸¹⁹³⁸ is an apocalyptic number.

981938 is a deficient number, since it is larger than the sum of its proper divisors (490972).

981938 is a wasteful number, since it uses less digits than its factorization.

981938 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 490971.

The product of its digits is 15552, while the sum is 38.

The square root of 981938 is about 990.9278480293. The cubic root of 981938 is about 99.3942716735.

The spelling of 981938 in words is "nine hundred eighty-one thousand, nine hundred thirty-eight".