991134932 has 6 divisors (see below), whose sum is σ = 1734486138. Its totient is φ = 495567464.

The previous prime is 991134899. The next prime is 991134941. The reversal of 991134932 is 239431199.

It can be written as a sum of positive squares in only one way, i.e., 707347216 + 283787716 = 26596^2 + 16846^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 991134932.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 123891863 + ... + 123891870.

It is an arithmetic number, because the mean of its divisors is an integer number (289081023).

Almost surely, 2^991134932 is an apocalyptic number.

It is an amenable number.

991134932 is a deficient number, since it is larger than the sum of its proper divisors (743351206).

991134932 is a wasteful number, since it uses less digits than its factorization.

991134932 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 247783737 (or 247783735 counting only the distinct ones).

The product of its digits is 52488, while the sum is 41.

The square root of 991134932 is about 31482.2955325688. The cubic root of 991134932 is about 997.0362019123.

The spelling of 991134932 in words is "nine hundred ninety-one million, one hundred thirty-four thousand, nine hundred thirty-two".