207139243 has 2 divisors, whose sum is σ = 207139244. Its totient is φ = 207139242.

The previous prime is 207139201. The next prime is 207139249. The reversal of 207139243 is 342931702.

207139243 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 207139243 - 2⁹ = 207138731 is a prime.

It is a super-2 number, since 2×207139243² = 85813331981226098, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (207139249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 103569621 + 103569622.

It is an arithmetic number, because the mean of its divisors is an integer number (103569622).

Almost surely, 2^207139243 is an apocalyptic number.

207139243 is a deficient number, since it is larger than the sum of its proper divisors (1).

207139243 is an equidigital number, since it uses as much as digits as its factorization.

207139243 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9072, while the sum is 31.

The square root of 207139243 is about 14392.3327852020. The cubic root of 207139243 is about 591.6807794381.

It can be divided in two parts, 2071 and 39243, that added together give a palindrome (41314).

The spelling of 207139243 in words is "two hundred seven million, one hundred thirty-nine thousand, two hundred forty-three".