991396 has 12 divisors (see below), whose sum is σ = 1982848. Its totient is φ = 424872.

The previous prime is 991387. The next prime is 991409. The reversal of 991396 is 693199.

991396 is an admirable number.

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, 17676 + ... + 17731.

2⁹⁹¹³⁹⁶ is an apocalyptic number.

It is an amenable number.

991396 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

991396 is a wasteful number, since it uses less digits than its factorization.

991396 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35418 (or 35416 counting only the distinct ones).

The product of its digits is 13122, while the sum is 37.

The square root of 991396 is about 995.6887063736. The cubic root of 991396 is about 99.7123735032.

The spelling of 991396 in words is "nine hundred ninety-one thousand, three hundred ninety-six".