209338793 has 2 divisors, whose sum is σ = 209338794. Its totient is φ = 209338792.

The previous prime is 209338777. The next prime is 209338813. The reversal of 209338793 is 397833902.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 122699929 + 86638864 = 11077^2 + 9308^2 .

It is a cyclic number.

It is not a de Polignac number, because 209338793 - 2⁴ = 209338777 is a prime.

It is not a weakly prime, because it can be changed into another prime (209338993) 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 as a sum of consecutive naturals, namely, 104669396 + 104669397.

It is an arithmetic number, because the mean of its divisors is an integer number (104669397).

Almost surely, 2^209338793 is an apocalyptic number.

It is an amenable number.

209338793 is a deficient number, since it is larger than the sum of its proper divisors (1).

209338793 is an equidigital number, since it uses as much as digits as its factorization.

209338793 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 244944, while the sum is 44.

The square root of 209338793 is about 14468.5449510308. The cubic root of 209338793 is about 593.7677040261.

The spelling of 209338793 in words is "two hundred nine million, three hundred thirty-eight thousand, seven hundred ninety-three".