961663900 has 36 divisors (see below), whose sum is σ = 2105302752. Its totient is φ = 381256960.

The previous prime is 961663889. The next prime is 961663907. The reversal of 961663900 is 9366169.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (961663907) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 31252 + ... + 53851.

It is an arithmetic number, because the mean of its divisors is an integer number (58480632).

Almost surely, 2^961663900 is an apocalyptic number.

It is an amenable number.

961663900 is an abundant number, since it is smaller than the sum of its proper divisors (1143638852).

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

961663900 is a wasteful number, since it uses less digits than its factorization.

961663900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85230 (or 85223 counting only the distinct ones).

The product of its (nonzero) digits is 52488, while the sum is 40.

The square root of 961663900 is about 31010.7062157572. The cubic root of 961663900 is about 987.0544355328.

The spelling of 961663900 in words is "nine hundred sixty-one million, six hundred sixty-three thousand, nine hundred".