2161979003 has 4 divisors (see below), whose sum is σ = 2162598288. Its totient is φ = 2161359720.

The previous prime is 2161978999. The next prime is 2161979051. The reversal of 2161979003 is 3009791612.

It is a happy number.

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 2161979003 - 2² = 2161978999 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2161979503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 304376 + ... + 311397.

It is an arithmetic number, because the mean of its divisors is an integer number (540649572).

Almost surely, 2^2161979003 is an apocalyptic number.

2161979003 is a deficient number, since it is larger than the sum of its proper divisors (619285).

2161979003 is an equidigital number, since it uses as much as digits as its factorization.

2161979003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 619284.

The product of its (nonzero) digits is 20412, while the sum is 38.

The square root of 2161979003 is about 46497.0859624558. The cubic root of 2161979003 is about 1293.0554743207.

The spelling of 2161979003 in words is "two billion, one hundred sixty-one million, nine hundred seventy-nine thousand, three".