991106365 has 8 divisors (see below), whose sum is σ = 1193956920. Its totient is φ = 789798912.

The previous prime is 991106359. The next prime is 991106393. The reversal of 991106365 is 563601199.

It can be written as a sum of positive squares in 4 ways, for example, as 593263449 + 397842916 = 24357^2 + 19946^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 991106365 - 2¹⁹ = 990582077 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 384360 + ... + 386929.

It is an arithmetic number, because the mean of its divisors is an integer number (149244615).

Almost surely, 2^991106365 is an apocalyptic number.

It is an amenable number.

991106365 is a deficient number, since it is larger than the sum of its proper divisors (202850555).

991106365 is a wasteful number, since it uses less digits than its factorization.

991106365 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 771551.

The product of its (nonzero) digits is 43740, while the sum is 40.

The square root of 991106365 is about 31481.8418298549. The cubic root of 991106365 is about 997.0266227905.

The spelling of 991106365 in words is "nine hundred ninety-one million, one hundred six thousand, three hundred sixty-five".