991112858 has 8 divisors (see below), whose sum is σ = 1526849652. Its totient is φ = 482162976.

The previous prime is 991112839. The next prime is 991112867. The reversal of 991112858 is 858211199.

It can be written as a sum of positive squares in 2 ways, for example, as 989542849 + 1570009 = 31457^2 + 1253^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6696635 + ... + 6696782.

Almost surely, 2^991112858 is an apocalyptic number.

991112858 is a deficient number, since it is larger than the sum of its proper divisors (535736794).

991112858 is a wasteful number, since it uses less digits than its factorization.

991112858 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13393456.

The product of its digits is 51840, while the sum is 44.

The square root of 991112858 is about 31481.9449526232. The cubic root of 991112858 is about 997.0288000475.

The spelling of 991112858 in words is "nine hundred ninety-one million, one hundred twelve thousand, eight hundred fifty-eight".