969698981 has 4 divisors (see below), whose sum is σ = 969764364. Its totient is φ = 969633600.

The previous prime is 969698911. The next prime is 969698987. The reversal of 969698981 is 189896969.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 319193956 + 650505025 = 17866^2 + 25505^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-969698981 is a prime.

It is a super-2 number, since 2×969698981² = 1880632227504876722, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (969698987) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1421 + ... + 44061.

It is an arithmetic number, because the mean of its divisors is an integer number (242441091).

Almost surely, 2^969698981 is an apocalyptic number.

It is an amenable number.

969698981 is a deficient number, since it is larger than the sum of its proper divisors (65383).

969698981 is a wasteful number, since it uses less digits than its factorization.

969698981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65382.

The product of its digits is 15116544, while the sum is 65.

The square root of 969698981 is about 31139.9900610132. The cubic root of 969698981 is about 989.7958906494.

The spelling of 969698981 in words is "nine hundred sixty-nine million, six hundred ninety-eight thousand, nine hundred eighty-one".