2016401979 has 4 divisors (see below), whose sum is σ = 2688535976. Its totient is φ = 1344267984.

The previous prime is 2016401899. The next prime is 2016401993. The reversal of 2016401979 is 9791046102.

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

It is not a de Polignac number, because 2016401979 - 2²⁴ = 1999624763 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2016401879) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 336066994 + ... + 336066999.

It is an arithmetic number, because the mean of its divisors is an integer number (672133994).

Almost surely, 2^2016401979 is an apocalyptic number.

2016401979 is a deficient number, since it is larger than the sum of its proper divisors (672133997).

2016401979 is an equidigital number, since it uses as much as digits as its factorization.

2016401979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 672133996.

The product of its (nonzero) digits is 27216, while the sum is 39.

The square root of 2016401979 is about 44904.3648101162. The cubic root of 2016401979 is about 1263.3558770437.

The spelling of 2016401979 in words is "two billion, sixteen million, four hundred one thousand, nine hundred seventy-nine".