2117738449 has 4 divisors (see below), whose sum is σ = 2118068464. Its totient is φ = 2117408436.

The previous prime is 2117738431. The next prime is 2117738473. The reversal of 2117738449 is 9448377112.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2117738449 - 2⁵ = 2117738417 is a prime.

It is a super-2 number, since 2×2117738449² = 8969632276745851202, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2117738399 and 2117738408.

It is not an unprimeable number, because it can be changed into a prime (2117738419) 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, 155187 + ... + 168280.

It is an arithmetic number, because the mean of its divisors is an integer number (529517116).

Almost surely, 2^2117738449 is an apocalyptic number.

It is an amenable number.

2117738449 is a deficient number, since it is larger than the sum of its proper divisors (330015).

2117738449 is an equidigital number, since it uses as much as digits as its factorization.

2117738449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 330014.

The product of its digits is 338688, while the sum is 46.

The square root of 2117738449 is about 46018.8923052261. The cubic root of 2117738449 is about 1284.1746932937.

The spelling of 2117738449 in words is "two billion, one hundred seventeen million, seven hundred thirty-eight thousand, four hundred forty-nine".