206961407 has 2 divisors, whose sum is σ = 206961408. Its totient is φ = 206961406.

The previous prime is 206961397. The next prime is 206961437. The reversal of 206961407 is 704169602.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 206961407 - 2¹⁸ = 206699263 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (206961437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 103480703 + 103480704.

It is an arithmetic number, because the mean of its divisors is an integer number (103480704).

Almost surely, 2^206961407 is an apocalyptic number.

206961407 is a deficient number, since it is larger than the sum of its proper divisors (1).

206961407 is an equidigital number, since it uses as much as digits as its factorization.

206961407 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18144, while the sum is 35.

The square root of 206961407 is about 14386.1533079555. The cubic root of 206961407 is about 591.5114050144.

The spelling of 206961407 in words is "two hundred six million, nine hundred sixty-one thousand, four hundred seven".