959981 has 8 divisors (see below), whose sum is σ = 1054944. Its totient is φ = 866320.

The previous prime is 959969. The next prime is 960017. The reversal of 959981 is 189959.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 959981 - 2¹⁰ = 958957 is a prime.

It is a super-2 number, since 2×959981² = 1843127040722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (959911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1946 + ... + 2388.

It is an arithmetic number, because the mean of its divisors is an integer number (131868).

2⁹⁵⁹⁹⁸¹ is an apocalyptic number.

It is an amenable number.

959981 is a deficient number, since it is larger than the sum of its proper divisors (94963).

959981 is a wasteful number, since it uses less digits than its factorization.

959981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 651.

The product of its digits is 29160, while the sum is 41.

The square root of 959981 is about 979.7862011684. The cubic root of 959981 is about 98.6478321630.

The spelling of 959981 in words is "nine hundred fifty-nine thousand, nine hundred eighty-one".