207138653 has 2 divisors, whose sum is σ = 207138654. Its totient is φ = 207138652.

The previous prime is 207138647. The next prime is 207138709. The reversal of 207138653 is 356831702.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 201583204 + 5555449 = 14198^2 + 2357^2 .

It is a cyclic number.

It is not a de Polignac number, because 207138653 - 2⁴ = 207138637 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (207138643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 103569326 + 103569327.

It is an arithmetic number, because the mean of its divisors is an integer number (103569327).

Almost surely, 2^207138653 is an apocalyptic number.

It is an amenable number.

207138653 is a deficient number, since it is larger than the sum of its proper divisors (1).

207138653 is an equidigital number, since it uses as much as digits as its factorization.

207138653 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 30240, while the sum is 35.

The square root of 207138653 is about 14392.3122881627. The cubic root of 207138653 is about 591.6802176711.

The spelling of 207138653 in words is "two hundred seven million, one hundred thirty-eight thousand, six hundred fifty-three".