991342 has 8 divisors (see below), whose sum is σ = 1622232. Its totient is φ = 450600.

The previous prime is 991327. The next prime is 991343. The reversal of 991342 is 243199.

It is a happy number.

991342 is nontrivially palindromic in base 9.

991342 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 991342.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (991343) 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, 22509 + ... + 22552.

It is an arithmetic number, because the mean of its divisors is an integer number (202779).

2⁹⁹¹³⁴² is an apocalyptic number.

991342 is a deficient number, since it is larger than the sum of its proper divisors (630890).

991342 is a wasteful number, since it uses less digits than its factorization.

991342 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45074.

The product of its digits is 1944, while the sum is 28.

The square root of 991342 is about 995.6615890954. The cubic root of 991342 is about 99.7105630709.

It can be divided in two parts, 99 and 1342, that added together give a palindrome (1441).

The spelling of 991342 in words is "nine hundred ninety-one thousand, three hundred forty-two".