209670133 has 2 divisors, whose sum is σ = 209670134. Its totient is φ = 209670132.

The previous prime is 209670119. The next prime is 209670151. The reversal of 209670133 is 331076902.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 136002244 + 73667889 = 11662^2 + 8583^2 .

It is a cyclic number.

It is not a de Polignac number, because 209670133 - 2⁵ = 209670101 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 209670095 and 209670104.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (209670103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 104835066 + 104835067.

It is an arithmetic number, because the mean of its divisors is an integer number (104835067).

Almost surely, 2^209670133 is an apocalyptic number.

It is an amenable number.

209670133 is a deficient number, since it is larger than the sum of its proper divisors (1).

209670133 is an equidigital number, since it uses as much as digits as its factorization.

209670133 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6804, while the sum is 31.

The square root of 209670133 is about 14479.9907803838. The cubic root of 209670133 is about 594.0808093682.

The spelling of 209670133 in words is "two hundred nine million, six hundred seventy thousand, one hundred thirty-three".