207945869 has 2 divisors, whose sum is σ = 207945870. Its totient is φ = 207945868.

The previous prime is 207945797. The next prime is 207945917. The reversal of 207945869 is 968549702.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 206353225 + 1592644 = 14365^2 + 1262^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-207945869 is a prime.

It is a super-2 number, since 2×207945869² = 86482968868330322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (207941869) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 103972934 + 103972935.

It is an arithmetic number, because the mean of its divisors is an integer number (103972935).

Almost surely, 2^207945869 is an apocalyptic number.

It is an amenable number.

207945869 is a deficient number, since it is larger than the sum of its proper divisors (1).

207945869 is an equidigital number, since it uses as much as digits as its factorization.

207945869 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1088640, while the sum is 50.

The square root of 207945869 is about 14420.3283249724. The cubic root of 207945869 is about 592.4478108648.

The spelling of 207945869 in words is "two hundred seven million, nine hundred forty-five thousand, eight hundred sixty-nine".