2139233 has 2 divisors, whose sum is σ = 2139234. Its totient is φ = 2139232.

The previous prime is 2139227. The next prime is 2139283. The reversal of 2139233 is 3329312.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2122849 + 16384 = 1457^2 + 128^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2139233 is a prime.

It is a Sophie Germain prime.

It is a d-powerful number, because it can be written as 2⁷ + 1 + 3⁶ + 9² + 2¹⁹ + 3⁹ + 3¹³ .

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2139199 and 2139208.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2139283) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1069616 + 1069617.

It is an arithmetic number, because the mean of its divisors is an integer number (1069617).

2^2139233 is an apocalyptic number.

It is an amenable number.

2139233 is a deficient number, since it is larger than the sum of its proper divisors (1).

2139233 is an equidigital number, since it uses as much as digits as its factorization.

2139233 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 972, while the sum is 23.

The square root of 2139233 is about 1462.6117051357. The cubic root of 2139233 is about 128.8504767563.

The spelling of 2139233 in words is "two million, one hundred thirty-nine thousand, two hundred thirty-three".