207129869 has 2 divisors, whose sum is σ = 207129870. Its totient is φ = 207129868.

The previous prime is 207129859. The next prime is 207129899. The reversal of 207129869 is 968921702.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 104816644 + 102313225 = 10238^2 + 10115^2 .

It is a cyclic number.

It is not a de Polignac number, because 207129869 - 2²⁴ = 190352653 is a prime.

It is a super-2 number, since 2×207129869² = 85805565263914322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (207129859) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 103564934 + 103564935.

It is an arithmetic number, because the mean of its divisors is an integer number (103564935).

Almost surely, 2^207129869 is an apocalyptic number.

It is an amenable number.

207129869 is a deficient number, since it is larger than the sum of its proper divisors (1).

207129869 is an equidigital number, since it uses as much as digits as its factorization.

207129869 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108864, while the sum is 44.

The square root of 207129869 is about 14392.0071220105. The cubic root of 207129869 is about 591.6718538812.

The spelling of 207129869 in words is "two hundred seven million, one hundred twenty-nine thousand, eight hundred sixty-nine".