2017979 has 8 divisors (see below), whose sum is σ = 2095632. Its totient is φ = 1941760.

The previous prime is 2017963. The next prime is 2017987. The reversal of 2017979 is 9797102.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2017979 - 2⁴ = 2017963 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2017909) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3107 + ... + 3699.

It is an arithmetic number, because the mean of its divisors is an integer number (261954).

2^2017979 is an apocalyptic number.

2017979 is a deficient number, since it is larger than the sum of its proper divisors (77653).

2017979 is an equidigital number, since it uses as much as digits as its factorization.

2017979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 717.

The product of its (nonzero) digits is 7938, while the sum is 35.

The square root of 2017979 is about 1420.5558771129. Note that the first 3 decimals coincide. The cubic root of 2017979 is about 126.3685146636.

The spelling of 2017979 in words is "two million, seventeen thousand, nine hundred seventy-nine".