206622469 has 2 divisors, whose sum is σ = 206622470. Its totient is φ = 206622468.

The previous prime is 206622443. The next prime is 206622487. The reversal of 206622469 is 964226602.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 188046369 + 18576100 = 13713^2 + 4310^2 .

It is a cyclic number.

It is not a de Polignac number, because 206622469 - 2⁷ = 206622341 is a prime.

It is a super-2 number, since 2×206622469² = 85385689391311922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (206622499) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 103311234 + 103311235.

It is an arithmetic number, because the mean of its divisors is an integer number (103311235).

Almost surely, 2^206622469 is an apocalyptic number.

It is an amenable number.

206622469 is a deficient number, since it is larger than the sum of its proper divisors (1).

206622469 is an equidigital number, since it uses as much as digits as its factorization.

206622469 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 62208, while the sum is 37.

The square root of 206622469 is about 14374.3684730843. The cubic root of 206622469 is about 591.1883250750.

The spelling of 206622469 in words is "two hundred six million, six hundred twenty-two thousand, four hundred sixty-nine".