991734 has 16 divisors (see below), whose sum is σ = 2013888. Its totient is φ = 325512.

The previous prime is 991733. The next prime is 991741. The reversal of 991734 is 437199.

It is a junction number, because it is equal to n+sod(n) for n = 991695 and 991704.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 991734.

It is not an unprimeable number, because it can be changed into a prime (991733) 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, 832 + ... + 1635.

It is an arithmetic number, because the mean of its divisors is an integer number (125868).

2⁹⁹¹⁷³⁴ is an apocalyptic number.

991734 is an abundant number, since it is smaller than the sum of its proper divisors (1022154).

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

991734 is a wasteful number, since it uses less digits than its factorization.

991734 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2539.

The product of its digits is 6804, while the sum is 33.

The square root of 991734 is about 995.8584236728. The cubic root of 991734 is about 99.7237039748.

The spelling of 991734 in words is "nine hundred ninety-one thousand, seven hundred thirty-four".