2217346979 has 4 divisors (see below), whose sum is σ = 2242261080. Its totient is φ = 2192432880.

The previous prime is 2217346961. The next prime is 2217346991. The reversal of 2217346979 is 9796437122.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2217346979 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2217346939) 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, 12456917 + ... + 12457094.

It is an arithmetic number, because the mean of its divisors is an integer number (560565270).

Almost surely, 2^2217346979 is an apocalyptic number.

2217346979 is a deficient number, since it is larger than the sum of its proper divisors (24914101).

2217346979 is an equidigital number, since it uses as much as digits as its factorization.

2217346979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24914100.

The product of its digits is 1143072, while the sum is 50.

The square root of 2217346979 is about 47088.7139238268. The cubic root of 2217346979 is about 1304.0008850769. Note that the first 3 decimals are identical.

The spelling of 2217346979 in words is "two billion, two hundred seventeen million, three hundred forty-six thousand, nine hundred seventy-nine".