711145891 has 4 divisors (see below), whose sum is σ = 724563792. Its totient is φ = 697727992.

The previous prime is 711145847. The next prime is 711145931. The reversal of 711145891 is 198541117.

It is a happy number.

711145891 is digitally balanced in base 2, 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 an emirpimes, since its reverse is a distinct semiprime: 198541117 = 521 ⋅381077.

It is a cyclic number.

It is not a de Polignac number, because 711145891 - 2¹¹ = 711143843 is a prime.

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 711145891.

It is not an unprimeable number, because it can be changed into a prime (711145811) 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, 6708871 + ... + 6708976.

It is an arithmetic number, because the mean of its divisors is an integer number (181140948).

Almost surely, 2^711145891 is an apocalyptic number.

711145891 is a deficient number, since it is larger than the sum of its proper divisors (13417901).

711145891 is a wasteful number, since it uses less digits than its factorization.

711145891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13417900.

The product of its digits is 10080, while the sum is 37.

The square root of 711145891 is about 26667.3187816098. The cubic root of 711145891 is about 892.5918182913.

The spelling of 711145891 in words is "seven hundred eleven million, one hundred forty-five thousand, eight hundred ninety-one".