1091313 has 16 divisors (see below), whose sum is σ = 1640000.
Its totient is φ = 726084.
The previous prime is 1091287. The next prime is 1091329. The reversal of 1091313 is 3131901.
It is not a de Polignac number, because 1091313 - 214 = 1074929 is a prime.
It is a Duffinian number.
It is not an unprimeable number, because it can be changed into a prime (1091393) by changing a digit.
It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1938 + ... + 2436.
It is an arithmetic number, because the mean of its divisors is an integer number (102500).
21091313 is an apocalyptic number.
It is an amenable number.
1091313 is a deficient number, since it is larger than the sum of its proper divisors (548687).
1091313 is an frugal number, since it uses more digits than its factorization.
1091313 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 520 (or 502 counting only the distinct ones).
The product of its (nonzero) digits is 81, while the sum is 18.
The square root of 1091313 is about 1044.6592745963.
The cubic root of 1091313 is about 102.9555531357.
The spelling of 1091313 in words is "one million, ninety-one thousand, three hundred thirteen".