969981 has 8 divisors (see below), whose sum is σ = 1298304. Its totient is φ = 644160.

The previous prime is 969977. The next prime is 969989. The reversal of 969981 is 189969.

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

It is not a de Polignac number, because 969981 - 2² = 969977 is a prime.

It is a super-2 number, since 2×969981² = 1881726280722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (969989) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 661 + ... + 1541.

It is an arithmetic number, because the mean of its divisors is an integer number (162288).

2⁹⁶⁹⁹⁸¹ is an apocalyptic number.

It is an amenable number.

969981 is a deficient number, since it is larger than the sum of its proper divisors (328323).

969981 is a wasteful number, since it uses less digits than its factorization.

969981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1251.

The product of its digits is 34992, while the sum is 42.

The square root of 969981 is about 984.8761343438. The cubic root of 969981 is about 98.9891835953.

The spelling of 969981 in words is "nine hundred sixty-nine thousand, nine hundred eighty-one".