207138853 has 2 divisors, whose sum is σ = 207138854. Its totient is φ = 207138852.

The previous prime is 207138809. The next prime is 207138881. The reversal of 207138853 is 358831702.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 173765124 + 33373729 = 13182^2 + 5777^2 .

It is a cyclic number.

It is not a de Polignac number, because 207138853 - 2⁹ = 207138341 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (207138803) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 103569426 + 103569427.

It is an arithmetic number, because the mean of its divisors is an integer number (103569427).

Almost surely, 2^207138853 is an apocalyptic number.

It is an amenable number.

207138853 is a deficient number, since it is larger than the sum of its proper divisors (1).

207138853 is an equidigital number, since it uses as much as digits as its factorization.

207138853 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 40320, while the sum is 37.

The square root of 207138853 is about 14392.3192363149. The cubic root of 207138853 is about 591.6804081007.

The spelling of 207138853 in words is "two hundred seven million, one hundred thirty-eight thousand, eight hundred fifty-three".