209795051 has 2 divisors, whose sum is σ = 209795052. Its totient is φ = 209795050.

The previous prime is 209794999. The next prime is 209795057. The reversal of 209795051 is 150597902.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 209795051 - 2⁶ = 209794987 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 209794996 and 209795014.

It is not a weakly prime, because it can be changed into another prime (209795057) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 104897525 + 104897526.

It is an arithmetic number, because the mean of its divisors is an integer number (104897526).

Almost surely, 2^209795051 is an apocalyptic number.

209795051 is a deficient number, since it is larger than the sum of its proper divisors (1).

209795051 is an equidigital number, since it uses as much as digits as its factorization.

209795051 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 28350, while the sum is 38.

The square root of 209795051 is about 14484.3036076989. The cubic root of 209795051 is about 594.1987671215.

The spelling of 209795051 in words is "two hundred nine million, seven hundred ninety-five thousand, fifty-one".