991130458 has 8 divisors (see below), whose sum is σ = 1499852628. Its totient is φ = 491179584.

The previous prime is 991130453. The next prime is 991130461. The reversal of 991130458 is 854031199.

It can be written as a sum of positive squares in 2 ways, for example, as 917908209 + 73222249 = 30297^2 + 8557^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 991130458.

It is not an unprimeable number, because it can be changed into a prime (991130453) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2192541 + ... + 2192992.

Almost surely, 2^991130458 is an apocalyptic number.

991130458 is a deficient number, since it is larger than the sum of its proper divisors (508722170).

991130458 is a wasteful number, since it uses less digits than its factorization.

991130458 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4385648.

The product of its (nonzero) digits is 38880, while the sum is 40.

The square root of 991130458 is about 31482.2244766789. The cubic root of 991130458 is about 997.0347016973.

The spelling of 991130458 in words is "nine hundred ninety-one million, one hundred thirty thousand, four hundred fifty-eight".