12918917 has 8 divisors (see below), whose sum is σ = 14835360. Its totient is φ = 11126160.

The previous prime is 12918911. The next prime is 12918923. The reversal of 12918917 is 71981921.

It is an interprime number because it is at equal distance from previous prime (12918911) and next prime (12918923).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12918917 - 2⁴ = 12918901 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 (12918911) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30698 + ... + 31115.

It is an arithmetic number, because the mean of its divisors is an integer number (1854420).

Almost surely, 2^12918917 is an apocalyptic number.

It is an amenable number.

12918917 is a deficient number, since it is larger than the sum of its proper divisors (1916443).

12918917 is a wasteful number, since it uses less digits than its factorization.

12918917 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61843.

The product of its digits is 9072, while the sum is 38.

The square root of 12918917 is about 3594.2894986353. The cubic root of 12918917 is about 234.6435943423.

The spelling of 12918917 in words is "twelve million, nine hundred eighteen thousand, nine hundred seventeen".