3405577891 has 4 divisors (see below), whose sum is σ = 3405694672. Its totient is φ = 3405461112.

The previous prime is 3405577873. The next prime is 3405577951. The reversal of 3405577891 is 1987755043.

It is a happy number.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1987755043 = 101 ⋅19680743.

It is a cyclic number.

It is not a de Polignac number, because 3405577891 - 2⁵ = 3405577859 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3405577811) 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, 26266 + ... + 86608.

It is an arithmetic number, because the mean of its divisors is an integer number (851423668).

Almost surely, 2^3405577891 is an apocalyptic number.

3405577891 is a deficient number, since it is larger than the sum of its proper divisors (116781).

3405577891 is an equidigital number, since it uses as much as digits as its factorization.

3405577891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116780.

The product of its (nonzero) digits is 1058400, while the sum is 49.

The square root of 3405577891 is about 58357.3293682979. The cubic root of 3405577891 is about 1504.5164454245.

The spelling of 3405577891 in words is "three billion, four hundred five million, five hundred seventy-seven thousand, eight hundred ninety-one".