5720738891 has 4 divisors (see below), whose sum is σ = 6537987312. Its totient is φ = 4903490472.

The previous prime is 5720738819. The next prime is 5720738923. The reversal of 5720738891 is 1988370275.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5720738891 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5720738591) 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, 408624200 + ... + 408624213.

It is an arithmetic number, because the mean of its divisors is an integer number (1634496828).

Almost surely, 2^5720738891 is an apocalyptic number.

5720738891 is a deficient number, since it is larger than the sum of its proper divisors (817248421).

5720738891 is an equidigital number, since it uses as much as digits as its factorization.

5720738891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 817248420.

The product of its (nonzero) digits is 846720, while the sum is 50.

The square root of 5720738891 is about 75635.5663097725. The cubic root of 5720738891 is about 1788.4798107191.

The spelling of 5720738891 in words is "five billion, seven hundred twenty million, seven hundred thirty-eight thousand, eight hundred ninety-one".