207639530139 has 4 divisors (see below), whose sum is σ = 276852706856. Its totient is φ = 138426353424.

The previous prime is 207639530123. The next prime is 207639530243. The reversal of 207639530139 is 931035936702.

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

It is not a de Polignac number, because 207639530139 - 2⁴ = 207639530123 is a prime.

It is a super-2 number, since 2×207639530139² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (207639530639) 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, 34606588354 + ... + 34606588359.

It is an arithmetic number, because the mean of its divisors is an integer number (69213176714).

Almost surely, 2^207639530139 is an apocalyptic number.

207639530139 is a deficient number, since it is larger than the sum of its proper divisors (69213176717).

207639530139 is an equidigital number, since it uses as much as digits as its factorization.

207639530139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69213176716.

The product of its (nonzero) digits is 918540, while the sum is 48.

The spelling of 207639530139 in words is "two hundred seven billion, six hundred thirty-nine million, five hundred thirty thousand, one hundred thirty-nine".