12730913 has 8 divisors (see below), whose sum is σ = 14183400. Its totient is φ = 11346048.

The previous prime is 12730889. The next prime is 12730933. The reversal of 12730913 is 31903721.

It can be written as a sum of positive squares in 4 ways, for example, as 1926544 + 10804369 = 1388^2 + 3287^2 .

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 12730913 - 2⁸ = 12730657 is a prime.

It is a super-2 number, since 2×12730913² = 324152291627138, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12730933) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16508 + ... + 17261.

It is an arithmetic number, because the mean of its divisors is an integer number (1772925).

Almost surely, 2^12730913 is an apocalyptic number.

12730913 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

12730913 is a deficient number, since it is larger than the sum of its proper divisors (1452487).

12730913 is a wasteful number, since it uses less digits than its factorization.

12730913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33811.

The product of its (nonzero) digits is 1134, while the sum is 26.

The square root of 12730913 is about 3568.0404986491. The cubic root of 12730913 is about 233.4998020684.

The spelling of 12730913 in words is "twelve million, seven hundred thirty thousand, nine hundred thirteen".