2091965 has 8 divisors (see below), whose sum is σ = 2619648. Its totient is φ = 1600720.

The previous prime is 2091959. The next prime is 2091983. The reversal of 2091965 is 5691902.

2091965 = 48² + 49² + ... + 185².

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

It is not a de Polignac number, because 2091965 - 2⁸ = 2091709 is a prime.

It is a super-2 number, since 2×2091965² = 8752635122450, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8981 + ... + 9210.

It is an arithmetic number, because the mean of its divisors is an integer number (327456).

2^2091965 is an apocalyptic number.

It is an amenable number.

2091965 is a deficient number, since it is larger than the sum of its proper divisors (527683).

2091965 is a wasteful number, since it uses less digits than its factorization.

2091965 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18219.

The product of its (nonzero) digits is 4860, while the sum is 32.

The square root of 2091965 is about 1446.3626792752. The cubic root of 2091965 is about 127.8943830909.

The spelling of 2091965 in words is "two million, ninety-one thousand, nine hundred sixty-five".