207979 has 4 divisors (see below), whose sum is σ = 214720. Its totient is φ = 201240.

The previous prime is 207973. The next prime is 207997. The reversal of 207979 is 979702.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 979702 = 2 ⋅489851.

It is a cyclic number.

It is not a de Polignac number, because 207979 - 2³ = 207971 is a prime.

It is a Duffinian number.

207979 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (207971) 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, 3324 + ... + 3385.

It is an arithmetic number, because the mean of its divisors is an integer number (53680).

2²⁰⁷⁹⁷⁹ is an apocalyptic number.

207979 is a deficient number, since it is larger than the sum of its proper divisors (6741).

207979 is an equidigital number, since it uses as much as digits as its factorization.

207979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6740.

The product of its (nonzero) digits is 7938, while the sum is 34.

The square root of 207979 is about 456.0471466855. The cubic root of 207979 is about 59.2479273133.

The spelling of 207979 in words is "two hundred seven thousand, nine hundred seventy-nine".