961797988369 has 9 divisors (see below), whose sum is σ = 1021720072177. Its totient is φ = 905205944704.

The previous prime is 961797988337. The next prime is 961797988379. The reversal of 961797988369 is 963889797169.

It is a happy number.

The square root of 961797988369 is 980713.

It is a perfect power (a square), and thus also a powerful number.

961797988369 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 8269174225 + 953528814144 = 90935^2 + 976488^2 .

It is not a de Polignac number, because 961797988369 - 2⁵ = 961797988337 is a prime.

It is a super-2 number, since 2×961797988369² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 961797988292 and 961797988301.

It is not an unprimeable number, because it can be changed into a prime (961797988379) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 16643277 + ... + 16700965.

Almost surely, 2^961797988369 is an apocalyptic number.

961797988369 is the 980713-rd square number.

961797988369 is the 490357-th centered octagonal number.

It is an amenable number.

961797988369 is a deficient number, since it is larger than the sum of its proper divisors (59922083808).

961797988369 is an frugal number, since it uses more digits than its factorization.

961797988369 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115412 (or 57706 counting only the distinct ones).

The product of its digits is 2222131968, while the sum is 82.

The spelling of 961797988369 in words is "nine hundred sixty-one billion, seven hundred ninety-seven million, nine hundred eighty-eight thousand, three hundred sixty-nine".