206954261 has 2 divisors, whose sum is σ = 206954262. Its totient is φ = 206954260.

The previous prime is 206954203. The next prime is 206954263. The reversal of 206954261 is 162459602.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 195832036 + 11122225 = 13994^2 + 3335^2 .

It is a cyclic number.

It is not a de Polignac number, because 206954261 - 2²² = 202759957 is a prime.

It is a super-2 number, since 2×206954261² = 85660132292112242, which contains 22 as substring.

Together with 206954263, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (206954263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 103477130 + 103477131.

It is an arithmetic number, because the mean of its divisors is an integer number (103477131).

Almost surely, 2^206954261 is an apocalyptic number.

It is an amenable number.

206954261 is a deficient number, since it is larger than the sum of its proper divisors (1).

206954261 is an equidigital number, since it uses as much as digits as its factorization.

206954261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25920, while the sum is 35.

The square root of 206954261 is about 14385.9049419910. The cubic root of 206954261 is about 591.5045969993.

The spelling of 206954261 in words is "two hundred six million, nine hundred fifty-four thousand, two hundred sixty-one".