991243114 has 8 divisors (see below), whose sum is σ = 1487164608. Its totient is φ = 495521580.

The previous prime is 991243111. The next prime is 991243133. The reversal of 991243114 is 411342199.

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

It is a super-2 number, since 2×991243114² = 1965125822104833992, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 991243114.

It is not an unprimeable number, because it can be changed into a prime (991243111) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36912 + ... + 57835.

It is an arithmetic number, because the mean of its divisors is an integer number (185895576).

Almost surely, 2^991243114 is an apocalyptic number.

991243114 is a deficient number, since it is larger than the sum of its proper divisors (495921494).

991243114 is a wasteful number, since it uses less digits than its factorization.

991243114 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99980.

The product of its digits is 7776, while the sum is 34.

The square root of 991243114 is about 31484.0136259658. The cubic root of 991243114 is about 997.0724759664.

The spelling of 991243114 in words is "nine hundred ninety-one million, two hundred forty-three thousand, one hundred fourteen".