956981 has 8 divisors (see below), whose sum is σ = 1038744. Its totient is φ = 878080.

The previous prime is 956953. The next prime is 956987. The reversal of 956981 is 189659.

It can be written as a sum of positive squares in 4 ways, for example, as 302500 + 654481 = 550^2 + 809^2 .

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 956981 - 2¹⁰ = 955957 is a prime.

It is a super-2 number, since 2×956981² = 1831625268722, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 956981.

It is not an unprimeable number, because it can be changed into a prime (956987) 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, 11 + ... + 1383.

It is an arithmetic number, because the mean of its divisors is an integer number (129843).

2⁹⁵⁶⁹⁸¹ is an apocalyptic number.

It is an amenable number.

956981 is a deficient number, since it is larger than the sum of its proper divisors (81763).

956981 is a wasteful number, since it uses less digits than its factorization.

956981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1431.

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

The square root of 956981 is about 978.2540569811. The cubic root of 956981 is about 98.5449647404.

The spelling of 956981 in words is "nine hundred fifty-six thousand, nine hundred eighty-one".