2179148791 has 4 divisors (see below), whose sum is σ = 2307334032. Its totient is φ = 2050963552.

The previous prime is 2179148773. The next prime is 2179148809. The reversal of 2179148791 is 1978419712.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (2179148773) and next prime (2179148809).

It is a cyclic number.

It is not a de Polignac number, because 2179148791 - 2⁷ = 2179148663 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 (2179148701) 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, 64092595 + ... + 64092628.

It is an arithmetic number, because the mean of its divisors is an integer number (576833508).

Almost surely, 2^2179148791 is an apocalyptic number.

2179148791 is a deficient number, since it is larger than the sum of its proper divisors (128185241).

2179148791 is a wasteful number, since it uses less digits than its factorization.

2179148791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128185240.

The product of its digits is 254016, while the sum is 49.

The square root of 2179148791 is about 46681.3537828542. The cubic root of 2179148791 is about 1296.4694719837.

The spelling of 2179148791 in words is "two billion, one hundred seventy-nine million, one hundred forty-eight thousand, seven hundred ninety-one".