84723574813 has 4 divisors (see below), whose sum is σ = 84872474460. Its totient is φ = 84574675168.

The previous prime is 84723574807. The next prime is 84723574853. The reversal of 84723574813 is 31847532748.

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

It can be written as a sum of positive squares in 2 ways, for example, as 9086474329 + 75637100484 = 95323^2 + 275022^2 .

It is a cyclic number.

It is not a de Polignac number, because 84723574813 - 2⁹ = 84723574301 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 (84723574853) 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, 74448970 + ... + 74450107.

It is an arithmetic number, because the mean of its divisors is an integer number (21218118615).

Almost surely, 2^84723574813 is an apocalyptic number.

It is an amenable number.

84723574813 is a deficient number, since it is larger than the sum of its proper divisors (148899647).

84723574813 is a wasteful number, since it uses less digits than its factorization.

84723574813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148899646.

The product of its digits is 4515840, while the sum is 52.

The spelling of 84723574813 in words is "eighty-four billion, seven hundred twenty-three million, five hundred seventy-four thousand, eight hundred thirteen".