2100653 has 4 divisors (see below), whose sum is σ = 2168448. Its totient is φ = 2032860.

The previous prime is 2100649. The next prime is 2100661. The reversal of 2100653 is 3560012.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2100653 - 2² = 2100649 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 (2100053) 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, 33851 + ... + 33912.

It is an arithmetic number, because the mean of its divisors is an integer number (542112).

2^2100653 is an apocalyptic number.

It is an amenable number.

2100653 is a deficient number, since it is larger than the sum of its proper divisors (67795).

2100653 is an equidigital number, since it uses as much as digits as its factorization.

2100653 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67794.

The product of its (nonzero) digits is 180, while the sum is 17.

The square root of 2100653 is about 1449.3629635119. The cubic root of 2100653 is about 128.0711884279.

Adding to 2100653 its reverse (3560012), we get a palindrome (5660665).

The spelling of 2100653 in words is "two million, one hundred thousand, six hundred fifty-three".