9991962 has 12 divisors (see below), whose sum is σ = 21649290. Its totient is φ = 3330648.

The previous prime is 9991939. The next prime is 9991963. The reversal of 9991962 is 2691999.

It is a happy number.

9991962 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 only one way, i.e., 6610041 + 3381921 = 2571^2 + 1839^2 .

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (9991963) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 277537 + ... + 277572.

Almost surely, 2^9991962 is an apocalyptic number.

9991962 is an abundant number, since it is smaller than the sum of its proper divisors (11657328).

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

9991962 is a wasteful number, since it uses less digits than its factorization.

9991962 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 555117 (or 555114 counting only the distinct ones).

The product of its digits is 78732, while the sum is 45.

The square root of 9991962 is about 3161.0064852828. The cubic root of 9991962 is about 215.3857290432.

The spelling of 9991962 in words is "nine million, nine hundred ninety-one thousand, nine hundred sixty-two".