3551897891 has 4 divisors (see below), whose sum is σ = 3552166752. Its totient is φ = 3551629032.

The previous prime is 3551897879. The next prime is 3551897893. The reversal of 3551897891 is 1987981553.

3551897891 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.

It is a cyclic number.

It is not a de Polignac number, because 3551897891 - 2⁶ = 3551897827 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3551897893) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 113531 + ... + 141396.

It is an arithmetic number, because the mean of its divisors is an integer number (888041688).

Almost surely, 2^3551897891 is an apocalyptic number.

3551897891 is a deficient number, since it is larger than the sum of its proper divisors (268861).

3551897891 is a wasteful number, since it uses less digits than its factorization.

3551897891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 268860.

The product of its digits is 2721600, while the sum is 56.

The square root of 3551897891 is about 59597.8010584283. The cubic root of 3551897891 is about 1525.7621045786.

The spelling of 3551897891 in words is "three billion, five hundred fifty-one million, eight hundred ninety-seven thousand, eight hundred ninety-one".