12779930 has 8 divisors (see below), whose sum is σ = 23003892. Its totient is φ = 5111968.

The previous prime is 12779917. The next prime is 12779939. The reversal of 12779930 is 3997721.

It can be written as a sum of positive squares in 2 ways, for example, as 12752041 + 27889 = 3571^2 + 167^2 .

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

It is a super-2 number, since 2×12779930² = 326653221609800, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (12779939) 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, 638987 + ... + 639006.

Almost surely, 2^12779930 is an apocalyptic number.

12779930 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12779930 is a deficient number, since it is larger than the sum of its proper divisors (10223962).

12779930 is a wasteful number, since it uses less digits than its factorization.

12779930 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1278000.

The product of its (nonzero) digits is 23814, while the sum is 38.

The square root of 12779930 is about 3574.9027958813. The cubic root of 12779930 is about 233.7990946094.

The spelling of 12779930 in words is "twelve million, seven hundred seventy-nine thousand, nine hundred thirty".