969696989 has 2 divisors, whose sum is σ = 969696990. Its totient is φ = 969696988.

The previous prime is 969696941. The next prime is 969697007. The reversal of 969696989 is 989696969.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 591705625 + 377991364 = 24325^2 + 19442^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-969696989 is a prime.

It is a super-2 number, since 2×969696989² = 1880624500951332242, which contains 22 as substring.

It is a Chen prime.

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

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (969696929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 484848494 + 484848495.

It is an arithmetic number, because the mean of its divisors is an integer number (484848495).

Almost surely, 2^969696989 is an apocalyptic number.

It is an amenable number.

969696989 is a deficient number, since it is larger than the sum of its proper divisors (1).

969696989 is an equidigital number, since it uses as much as digits as its factorization.

969696989 is an evil number, because the sum of its binary digits is even.

The product of its digits is 102036672, while the sum is 71.

The square root of 969696989 is about 31139.9580764008. The cubic root of 969696989 is about 989.7952128876.

The spelling of 969696989 in words is "nine hundred sixty-nine million, six hundred ninety-six thousand, nine hundred eighty-nine".