2077765 has 4 divisors (see below), whose sum is σ = 2493324. Its totient is φ = 1662208.

The previous prime is 2077753. The next prime is 2077769. The reversal of 2077765 is 5677702.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5677702 = 2 ⋅2838851.

It can be written as a sum of positive squares in 2 ways, for example, as 1292769 + 784996 = 1137^2 + 886^2 .

It is a cyclic number.

It is not a de Polignac number, because 2077765 - 2⁷ = 2077637 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2077765.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2077769) 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, 207772 + ... + 207781.

It is an arithmetic number, because the mean of its divisors is an integer number (623331).

2^2077765 is an apocalyptic number.

It is an amenable number.

2077765 is a deficient number, since it is larger than the sum of its proper divisors (415559).

2077765 is an equidigital number, since it uses as much as digits as its factorization.

2077765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 415558.

The product of its (nonzero) digits is 20580, while the sum is 34.

The square root of 2077765 is about 1441.4454550901. The cubic root of 2077765 is about 127.6043487674.

The spelling of 2077765 in words is "two million, seventy-seven thousand, seven hundred sixty-five".