955981 has 8 divisors (see below), whose sum is σ = 1038464. Its totient is φ = 874800.

The previous prime is 955967. The next prime is 955987. The reversal of 955981 is 189559.

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

It is a 4-Lehmer number, since φ(955981) divides (955981-1)⁴.

It is a cyclic number.

It is not a de Polignac number, because 955981 - 2⁷ = 955853 is a prime.

It is a super-2 number, since 2×955981² = 1827799344722, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 955981.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (955987) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1720 + ... + 2206.

It is an arithmetic number, because the mean of its divisors is an integer number (129808).

2⁹⁵⁵⁹⁸¹ is an apocalyptic number.

955981 is the 565-th hex number.

It is an amenable number.

955981 is a deficient number, since it is larger than the sum of its proper divisors (82483).

955981 is a wasteful number, since it uses less digits than its factorization.

955981 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 16200, while the sum is 37.

The square root of 955981 is about 977.7428087181. The cubic root of 955981 is about 98.5106278311.

It can be divided in two parts, 955 and 981, that added together give a square (1936 = 44²).

The spelling of 955981 in words is "nine hundred fifty-five thousand, nine hundred eighty-one".