23218697 has 4 divisors (see below), whose sum is σ = 23230080. Its totient is φ = 23207316.

The previous prime is 23218693. The next prime is 23218709. The reversal of 23218697 is 79681232.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 23218697 - 2² = 23218693 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 23218697.

It is not an unprimeable number, because it can be changed into a prime (23218693) 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, 1697 + ... + 7022.

It is an arithmetic number, because the mean of its divisors is an integer number (5807520).

Almost surely, 2^23218697 is an apocalyptic number.

It is an amenable number.

23218697 is a deficient number, since it is larger than the sum of its proper divisors (11383).

23218697 is an equidigital number, since it uses as much as digits as its factorization.

23218697 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11382.

The product of its digits is 36288, while the sum is 38.

The square root of 23218697 is about 4818.5783173048. The cubic root of 23218697 is about 285.2852258922.

The spelling of 23218697 in words is "twenty-three million, two hundred eighteen thousand, six hundred ninety-seven".