3491228721289 has 3 divisors (see below), whose sum is σ = 3491230589773. Its totient is φ = 3491226852806.

The previous prime is 3491228721229. The next prime is 3491228721293. The reversal of 3491228721289 is 9821278221943.

The square root of 3491228721289 is 1868483.

It is a perfect power (a square), and thus also a powerful number.

3491228721289 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 3491228721289 - 2⁷ = 3491228721161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3491228721229) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 934242 + ... + 2802724.

Almost surely, 2^{3491228721289} is an apocalyptic number.

3491228721289 is the 1868483-rd square number.

3491228721289 is the 934242-nd centered octagonal number.

It is an amenable number.

3491228721289 is a deficient number, since it is larger than the sum of its proper divisors (1868484).

3491228721289 is an frugal number, since it uses more digits than its factorization.

3491228721289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3736966 (or 1868483 counting only the distinct ones).

The product of its digits is 6967296, while the sum is 58.

The spelling of 3491228721289 in words is "three trillion, four hundred ninety-one billion, two hundred twenty-eight million, seven hundred twenty-one thousand, two hundred eighty-nine".