3449189921 has 12 divisors (see below), whose sum is σ = 3610068480. Its totient is φ = 3292043040.

The previous prime is 3449189911. The next prime is 3449189929. The reversal of 3449189921 is 1299819443.

3449189921 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a de Polignac number, because none of the positive numbers 2^k-3449189921 is a prime.

It is a super-2 number, since 2×3449189921² = 23793822222255972482, which contains 22 as substring.

It is a Smith number, since the sum of its digits (50) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 3449189921.

It is not an unprimeable number, because it can be changed into a prime (3449189929) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 154760 + ... + 175638.

It is an arithmetic number, because the mean of its divisors is an integer number (300839040).

Almost surely, 2^3449189921 is an apocalyptic number.

3449189921 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

It is an amenable number.

3449189921 is a deficient number, since it is larger than the sum of its proper divisors (160878559).

3449189921 is an equidigital number, since it uses as much as digits as its factorization.

3449189921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21056 (or 20983 counting only the distinct ones).

The product of its digits is 559872, while the sum is 50.

The square root of 3449189921 is about 58729.8043671184. The cubic root of 3449189921 is about 1510.9115325795.

The spelling of 3449189921 in words is "three billion, four hundred forty-nine million, one hundred eighty-nine thousand, nine hundred twenty-one".