11723881073 has 4 divisors (see below), whose sum is σ = 11727848820. Its totient is φ = 11719913328.

The previous prime is 11723881067. The next prime is 11723881097. The reversal of 11723881073 is 37018832711.

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 2889385009 + 8834496064 = 53753^2 + 93992^2 .

It is a cyclic number.

It is not a de Polignac number, because 11723881073 - 2³² = 7428913777 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 11723881073.

It is not an unprimeable number, because it can be changed into a prime (11723881573) 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, 1979438 + ... + 1985351.

It is an arithmetic number, because the mean of its divisors is an integer number (2931962205).

Almost surely, 2^11723881073 is an apocalyptic number.

It is an amenable number.

11723881073 is a deficient number, since it is larger than the sum of its proper divisors (3967747).

11723881073 is an equidigital number, since it uses as much as digits as its factorization.

11723881073 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3967746.

The product of its (nonzero) digits is 56448, while the sum is 41.

The spelling of 11723881073 in words is "eleven billion, seven hundred twenty-three million, eight hundred eighty-one thousand, seventy-three".