207138307 has 4 divisors (see below), whose sum is σ = 207875736. Its totient is φ = 206400880.

The previous prime is 207138301. The next prime is 207138331. The reversal of 207138307 is 703831702.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 207138307 - 2⁷ = 207138179 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (207138301) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 368293 + ... + 368854.

It is an arithmetic number, because the mean of its divisors is an integer number (51968934).

Almost surely, 2^207138307 is an apocalyptic number.

207138307 is a deficient number, since it is larger than the sum of its proper divisors (737429).

207138307 is an equidigital number, since it uses as much as digits as its factorization.

207138307 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 737428.

The product of its (nonzero) digits is 7056, while the sum is 31.

The square root of 207138307 is about 14392.3002678516. The cubic root of 207138307 is about 591.6798882275.

The spelling of 207138307 in words is "two hundred seven million, one hundred thirty-eight thousand, three hundred seven".