209623433 has 2 divisors, whose sum is σ = 209623434. Its totient is φ = 209623432.

The previous prime is 209623411. The next prime is 209623439. The reversal of 209623433 is 334326902.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 184090624 + 25532809 = 13568^2 + 5053^2 .

It is a cyclic number.

It is not a de Polignac number, because 209623433 - 2¹⁰ = 209622409 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 209623433.

It is not a weakly prime, because it can be changed into another prime (209623439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 104811716 + 104811717.

It is an arithmetic number, because the mean of its divisors is an integer number (104811717).

Almost surely, 2^209623433 is an apocalyptic number.

It is an amenable number.

209623433 is a deficient number, since it is larger than the sum of its proper divisors (1).

209623433 is an equidigital number, since it uses as much as digits as its factorization.

209623433 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 23328, while the sum is 32.

The square root of 209623433 is about 14478.3781204940. The cubic root of 209623433 is about 594.0366993919.

The spelling of 209623433 in words is "two hundred nine million, six hundred twenty-three thousand, four hundred thirty-three".