12978693 has 72 divisors (see below), whose sum is σ = 24665472. Its totient is φ = 6424704.

The previous prime is 12978683. The next prime is 12978709. The reversal of 12978693 is 39687921.

It is not a de Polignac number, because 12978693 - 2⁶ = 12978629 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12978613) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 244855 + ... + 244907.

It is an arithmetic number, because the mean of its divisors is an integer number (342576).

Almost surely, 2^12978693 is an apocalyptic number.

12978693 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

12978693 is a deficient number, since it is larger than the sum of its proper divisors (11686779).

12978693 is a wasteful number, since it uses less digits than its factorization.

12978693 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115 (or 99 counting only the distinct ones).

The product of its digits is 163296, while the sum is 45.

The square root of 12978693 is about 3602.5953144920. The cubic root of 12978693 is about 235.0049372737.

The spelling of 12978693 in words is "twelve million, nine hundred seventy-eight thousand, six hundred ninety-three".