207020081 has 2 divisors, whose sum is σ = 207020082. Its totient is φ = 207020080.

The previous prime is 207020063. The next prime is 207020083. The reversal of 207020081 is 180020702.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 206640625 + 379456 = 14375^2 + 616^2 .

It is a cyclic number.

It is not a de Polignac number, because 207020081 - 2¹⁸ = 206757937 is a prime.

It is a super-2 number, since 2×207020081² = 85714627874493122, which contains 22 as substring.

Together with 207020083, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (207020083) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 103510040 + 103510041.

It is an arithmetic number, because the mean of its divisors is an integer number (103510041).

Almost surely, 2^207020081 is an apocalyptic number.

It is an amenable number.

207020081 is a deficient number, since it is larger than the sum of its proper divisors (1).

207020081 is an equidigital number, since it uses as much as digits as its factorization.

207020081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 224, while the sum is 20.

The square root of 207020081 is about 14388.1924160056. The cubic root of 207020081 is about 591.5672979809.

Adding to 207020081 its reverse (180020702), we get a palindrome (387040783).

The spelling of 207020081 in words is "two hundred seven million, twenty thousand, eighty-one".