83218723 has 16 divisors (see below), whose sum is σ = 101122560. Its totient is φ = 66854016.

The previous prime is 83218699. The next prime is 83218741. The reversal of 83218723 is 32781238.

It is a cyclic number.

It is not a de Polignac number, because 83218723 - 2⁹ = 83218211 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is not an unprimeable number, because it can be changed into a prime (83218753) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29968 + ... + 32626.

It is an arithmetic number, because the mean of its divisors is an integer number (6320160).

Almost surely, 2^83218723 is an apocalyptic number.

83218723 is a deficient number, since it is larger than the sum of its proper divisors (17903837).

83218723 is a wasteful number, since it uses less digits than its factorization.

83218723 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2946.

The product of its digits is 16128, while the sum is 34.

The square root of 83218723 is about 9122.4296653907. The cubic root of 83218723 is about 436.5898978019.

The spelling of 83218723 in words is "eighty-three million, two hundred eighteen thousand, seven hundred twenty-three".