2091365 has 4 divisors (see below), whose sum is σ = 2509644. Its totient is φ = 1673088.

The previous prime is 2091361. The next prime is 2091379. The reversal of 2091365 is 5631902.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 588289 + 1503076 = 767^2 + 1226^2 .

It is a cyclic number.

It is not a de Polignac number, because 2091365 - 2² = 2091361 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2091361) 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, 209132 + ... + 209141.

It is an arithmetic number, because the mean of its divisors is an integer number (627411).

2^2091365 is an apocalyptic number.

It is an amenable number.

2091365 is a deficient number, since it is larger than the sum of its proper divisors (418279).

2091365 is an equidigital number, since it uses as much as digits as its factorization.

2091365 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 418278.

The product of its (nonzero) digits is 1620, while the sum is 26.

The square root of 2091365 is about 1446.1552475443. The cubic root of 2091365 is about 127.8821547207.

The spelling of 2091365 in words is "two million, ninety-one thousand, three hundred sixty-five".