2691064213 has 4 divisors (see below), whose sum is σ = 2777872768. Its totient is φ = 2604255660.

The previous prime is 2691064177. The next prime is 2691064217. The reversal of 2691064213 is 3124601962.

It is a happy number.

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 2691064213 - 2²⁵ = 2657509781 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2691064217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43404231 + ... + 43404292.

It is an arithmetic number, because the mean of its divisors is an integer number (694468192).

Almost surely, 2^2691064213 is an apocalyptic number.

It is an amenable number.

2691064213 is a deficient number, since it is larger than the sum of its proper divisors (86808555).

2691064213 is an equidigital number, since it uses as much as digits as its factorization.

2691064213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86808554.

The product of its (nonzero) digits is 15552, while the sum is 34.

The square root of 2691064213 is about 51875.4683159584. The cubic root of 2691064213 is about 1390.9387949212.

The spelling of 2691064213 in words is "two billion, six hundred ninety-one million, sixty-four thousand, two hundred thirteen".