2193749 has 2 divisors, whose sum is σ = 2193750. Its totient is φ = 2193748.

The previous prime is 2193739. The next prime is 2193757. The reversal of 2193749 is 9473912.

2193749 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2146225 + 47524 = 1465^2 + 218^2 .

It is a cyclic number.

It is not a de Polignac number, because 2193749 - 2⁴ = 2193733 is a prime.

It is an Ulam number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2193739) 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 as a sum of consecutive naturals, namely, 1096874 + 1096875.

It is an arithmetic number, because the mean of its divisors is an integer number (1096875).

2^2193749 is an apocalyptic number.

It is an amenable number.

2193749 is a deficient number, since it is larger than the sum of its proper divisors (1).

2193749 is an equidigital number, since it uses as much as digits as its factorization.

2193749 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13608, while the sum is 35.

The square root of 2193749 is about 1481.1309867800. The cubic root of 2193749 is about 129.9358460578.

The spelling of 2193749 in words is "two million, one hundred ninety-three thousand, seven hundred forty-nine".