2303661 has 16 divisors (see below), whose sum is σ = 3180224. Its totient is φ = 1482624.

The previous prime is 2303629. The next prime is 2303663. The reversal of 2303661 is 1663032.

2303661 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2303661 - 2⁵ = 2303629 is a prime.

It is a Duffinian number.

2303661 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2303663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14595 + ... + 14751.

It is an arithmetic number, because the mean of its divisors is an integer number (198764).

2^2303661 is an apocalyptic number.

It is an amenable number.

2303661 is a deficient number, since it is larger than the sum of its proper divisors (876563).

2303661 is a wasteful number, since it uses less digits than its factorization.

2303661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 300.

The product of its (nonzero) digits is 648, while the sum is 21.

The square root of 2303661 is about 1517.7816048431. The cubic root of 2303661 is about 132.0706118988.

Adding to 2303661 its reverse (1663032), we get a palindrome (3966693).

The spelling of 2303661 in words is "two million, three hundred three thousand, six hundred sixty-one".