9461891791 has 4 divisors (see below), whose sum is σ = 10322063784. Its totient is φ = 8601719800.

The previous prime is 9461891717. The next prime is 9461891801. The reversal of 9461891791 is 1971981649.

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 9461891791 - 2⁹ = 9461891279 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 (9461894791) 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, 430085980 + ... + 430086001.

It is an arithmetic number, because the mean of its divisors is an integer number (2580515946).

Almost surely, 2^9461891791 is an apocalyptic number.

9461891791 is a deficient number, since it is larger than the sum of its proper divisors (860171993).

9461891791 is a wasteful number, since it uses less digits than its factorization.

9461891791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 860171992.

The product of its digits is 979776, while the sum is 55.

The square root of 9461891791 is about 97272.2560188670. The cubic root of 9461891791 is about 2115.0760733237.

The spelling of 9461891791 in words is "nine billion, four hundred sixty-one million, eight hundred ninety-one thousand, seven hundred ninety-one".