935981 has 4 divisors (see below), whose sum is σ = 957792. Its totient is φ = 914172.

The previous prime is 935971. The next prime is 935999. The reversal of 935981 is 189539.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 189539 = 7 ⋅27077.

It is a cyclic number.

It is not a de Polignac number, because 935981 - 2¹⁸ = 673837 is a prime.

It is a super-2 number, since 2×935981² = 1752120864722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (935971) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10841 + ... + 10926.

It is an arithmetic number, because the mean of its divisors is an integer number (239448).

2⁹³⁵⁹⁸¹ is an apocalyptic number.

It is an amenable number.

935981 is a deficient number, since it is larger than the sum of its proper divisors (21811).

935981 is a wasteful number, since it uses less digits than its factorization.

935981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21810.

The product of its digits is 9720, while the sum is 35.

The square root of 935981 is about 967.4611103295. The cubic root of 935981 is about 97.8188030419.

The spelling of 935981 in words is "nine hundred thirty-five thousand, nine hundred eighty-one".