991842342 has 16 divisors (see below), whose sum is σ = 1984087872. Its totient is φ = 330546920.

The previous prime is 991842337. The next prime is 991842349. The reversal of 991842342 is 243248199.

It is a junction number, because it is equal to n+sod(n) for n = 991842294 and 991842303.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (991842349) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22117 + ... + 49727.

It is an arithmetic number, because the mean of its divisors is an integer number (124005492).

Almost surely, 2^991842342 is an apocalyptic number.

991842342 is an abundant number, since it is smaller than the sum of its proper divisors (992245530).

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

991842342 is a wasteful number, since it uses less digits than its factorization.

991842342 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33603.

The product of its digits is 124416, while the sum is 42.

The square root of 991842342 is about 31493.5285733434. The cubic root of 991842342 is about 997.2733528190.

The spelling of 991842342 in words is "nine hundred ninety-one million, eight hundred forty-two thousand, three hundred forty-two".