961689936 has 80 divisors (see below), whose sum is σ = 2619260928. Its totient is φ = 303600000.

The previous prime is 961689931. The next prime is 961689943. The reversal of 961689936 is 639986169.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (961689931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 63061 + ... + 76811.

Almost surely, 2^961689936 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 961689936, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1309630464).

961689936 is an abundant number, since it is smaller than the sum of its proper divisors (1657570992).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

961689936 is a wasteful number, since it uses less digits than its factorization.

961689936 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13840 (or 13834 counting only the distinct ones).

The product of its digits is 3779136, while the sum is 57.

The square root of 961689936 is about 31011.1260034201. The cubic root of 961689936 is about 987.0633432594.

The spelling of 961689936 in words is "nine hundred sixty-one million, six hundred eighty-nine thousand, nine hundred thirty-six".