207213869 has 2 divisors, whose sum is σ = 207213870. Its totient is φ = 207213868.

The previous prime is 207213821. The next prime is 207213883. The reversal of 207213869 is 968312702.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 118156900 + 89056969 = 10870^2 + 9437^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-207213869 is a prime.

It is a super-2 number, since 2×207213869² = 85875175011898322, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (207212869) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 103606934 + 103606935.

It is an arithmetic number, because the mean of its divisors is an integer number (103606935).

Almost surely, 2^207213869 is an apocalyptic number.

It is an amenable number.

207213869 is a deficient number, since it is larger than the sum of its proper divisors (1).

207213869 is an equidigital number, since it uses as much as digits as its factorization.

207213869 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36288, while the sum is 38.

The square root of 207213869 is about 14394.9251126916. The cubic root of 207213869 is about 591.7518257992.

The spelling of 207213869 in words is "two hundred seven million, two hundred thirteen thousand, eight hundred sixty-nine".