12691930 has 8 divisors (see below), whose sum is σ = 22845492. Its totient is φ = 5076768.

The previous prime is 12691909. The next prime is 12691933. The reversal of 12691930 is 3919621.

12691930 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 12623809 + 68121 = 3553^2 + 261^2 .

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

It is a super-2 number, since 2×12691930² = 322170174249800, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12691892 and 12691901.

It is not an unprimeable number, because it can be changed into a prime (12691933) 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, 634587 + ... + 634606.

Almost surely, 2^12691930 is an apocalyptic number.

12691930 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12691930 is a deficient number, since it is larger than the sum of its proper divisors (10153562).

12691930 is a wasteful number, since it uses less digits than its factorization.

12691930 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1269200.

The product of its (nonzero) digits is 2916, while the sum is 31.

The square root of 12691930 is about 3562.5735080136. The cubic root of 12691930 is about 233.2612271527.

The spelling of 12691930 in words is "twelve million, six hundred ninety-one thousand, nine hundred thirty".