2209801979 has 8 divisors (see below), whose sum is σ = 2755077888. Its totient is φ = 1721923560.

The previous prime is 2209801939. The next prime is 2209801991. The reversal of 2209801979 is 9791089022.

It is a happy number.

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

It is a de Polignac number, because none of the positive numbers 2^k-2209801979 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2209801939) 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, 14349287 + ... + 14349440.

It is an arithmetic number, because the mean of its divisors is an integer number (344384736).

Almost surely, 2^2209801979 is an apocalyptic number.

2209801979 is a deficient number, since it is larger than the sum of its proper divisors (545275909).

2209801979 is a wasteful number, since it uses less digits than its factorization.

2209801979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28698745.

The product of its (nonzero) digits is 163296, while the sum is 47.

The square root of 2209801979 is about 47008.5309172708. The cubic root of 2209801979 is about 1302.5201564809.

The spelling of 2209801979 in words is "two billion, two hundred nine million, eight hundred one thousand, nine hundred seventy-nine".