9778969 has 2 divisors, whose sum is σ = 9778970. Its totient is φ = 9778968.

The previous prime is 9778963. The next prime is 9778973. The reversal of 9778969 is 9698779.

9778969 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9272025 + 506944 = 3045^2 + 712^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9778969 is a prime.

It is a super-2 number, since 2×9778969² = 191256469405922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (9778963) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4889484 + 4889485.

It is an arithmetic number, because the mean of its divisors is an integer number (4889485).

Almost surely, 2^9778969 is an apocalyptic number.

It is an amenable number.

9778969 is a deficient number, since it is larger than the sum of its proper divisors (1).

9778969 is an equidigital number, since it uses as much as digits as its factorization.

9778969 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1714608, while the sum is 55.

The square root of 9778969 is about 3127.1343111545. The cubic root of 9778969 is about 213.8443054793.

The spelling of 9778969 in words is "nine million, seven hundred seventy-eight thousand, nine hundred sixty-nine".