12690947 has 4 divisors (see below), whose sum is σ = 12714696. Its totient is φ = 12667200.

The previous prime is 12690943. The next prime is 12690961. The reversal of 12690947 is 74909621.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 74909621 = 113 ⋅662917.

It is a cyclic number.

It is not a de Polignac number, because 12690947 - 2² = 12690943 is a prime.

It is a super-2 number, since 2×12690947² = 322120271513618, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12690947.

It is not an unprimeable number, because it can be changed into a prime (12690941) 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, 11054 + ... + 12147.

It is an arithmetic number, because the mean of its divisors is an integer number (3178674).

Almost surely, 2^12690947 is an apocalyptic number.

12690947 is a deficient number, since it is larger than the sum of its proper divisors (23749).

12690947 is an equidigital number, since it uses as much as digits as its factorization.

12690947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23748.

The product of its (nonzero) digits is 27216, while the sum is 38.

The square root of 12690947 is about 3562.4355432765. The cubic root of 12690947 is about 233.2552049085.

The spelling of 12690947 in words is "twelve million, six hundred ninety thousand, nine hundred forty-seven".