206120599973 has 2 divisors, whose sum is σ = 206120599974. Its totient is φ = 206120599972.

The previous prime is 206120599967. The next prime is 206120600029. The reversal of 206120599973 is 379995021602.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 201463629409 + 4656970564 = 448847^2 + 68242^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-206120599973 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (206120599943) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 103060299986 + 103060299987.

It is an arithmetic number, because the mean of its divisors is an integer number (103060299987).

Almost surely, 2^206120599973 is an apocalyptic number.

It is an amenable number.

206120599973 is a deficient number, since it is larger than the sum of its proper divisors (1).

206120599973 is an equidigital number, since it uses as much as digits as its factorization.

206120599973 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1837080, while the sum is 53.

The spelling of 206120599973 in words is "two hundred six billion, one hundred twenty million, five hundred ninety-nine thousand, nine hundred seventy-three".