965981 has 4 divisors (see below), whose sum is σ = 968352. Its totient is φ = 963612.

The previous prime is 965969. The next prime is 965983. The reversal of 965981 is 189569.

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: 189569 = 163 ⋅1163.

It is a cyclic number.

It is not a de Polignac number, because 965981 - 2¹⁸ = 703837 is a prime.

It is a super-2 number, since 2×965981² = 1866238584722, 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 (965983) 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, 401 + ... + 1446.

It is an arithmetic number, because the mean of its divisors is an integer number (242088).

2⁹⁶⁵⁹⁸¹ is an apocalyptic number.

It is an amenable number.

965981 is a deficient number, since it is larger than the sum of its proper divisors (2371).

965981 is a wasteful number, since it uses less digits than its factorization.

965981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2370.

The product of its digits is 19440, while the sum is 38.

The square root of 965981 is about 982.8433242384. The cubic root of 965981 is about 98.8529258522.

The spelling of 965981 in words is "nine hundred sixty-five thousand, nine hundred eighty-one".