918722697983 has 4 divisors (see below), whose sum is σ = 918733314648. Its totient is φ = 918712081320.

The previous prime is 918722697941. The next prime is 918722697989. The reversal of 918722697983 is 389796227819.

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 918722697983 - 2¹² = 918722693887 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 (918722697989) 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, 5177453 + ... + 5351958.

It is an arithmetic number, because the mean of its divisors is an integer number (229683328662).

Almost surely, 2^918722697983 is an apocalyptic number.

918722697983 is a deficient number, since it is larger than the sum of its proper divisors (10616665).

918722697983 is a wasteful number, since it uses less digits than its factorization.

918722697983 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10616664.

The product of its digits is 164602368, while the sum is 71.

The spelling of 918722697983 in words is "nine hundred eighteen billion, seven hundred twenty-two million, six hundred ninety-seven thousand, nine hundred eighty-three".