2051723 has 4 divisors (see below), whose sum is σ = 2054808. Its totient is φ = 2048640.

The previous prime is 2051719. The next prime is 2051743. The reversal of 2051723 is 3271502.

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

It is a cyclic number.

It is not a de Polignac number, because 2051723 - 2² = 2051719 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2051695 and 2051704.

It is not an unprimeable number, because it can be changed into a prime (2051743) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 86 + ... + 2027.

It is an arithmetic number, because the mean of its divisors is an integer number (513702).

2^2051723 is an apocalyptic number.

2051723 is a deficient number, since it is larger than the sum of its proper divisors (3085).

2051723 is an equidigital number, since it uses as much as digits as its factorization.

2051723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3084.

The product of its (nonzero) digits is 420, while the sum is 20.

The square root of 2051723 is about 1432.3836776506. The cubic root of 2051723 is about 127.0689893213.

It can be divided in two parts, 205172 and 3, that multiplied together give a palindrome (615516).

The spelling of 2051723 in words is "two million, fifty-one thousand, seven hundred twenty-three".