12789947 has 2 divisors, whose sum is σ = 12789948. Its totient is φ = 12789946.

The previous prime is 12789943. The next prime is 12789971. The reversal of 12789947 is 74998721.

12789947 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12789947 - 2² = 12789943 is a prime.

It is not a weakly prime, because it can be changed into another prime (12789943) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6394973 + 6394974.

It is an arithmetic number, because the mean of its divisors is an integer number (6394974).

Almost surely, 2^12789947 is an apocalyptic number.

12789947 is a deficient number, since it is larger than the sum of its proper divisors (1).

12789947 is an equidigital number, since it uses as much as digits as its factorization.

12789947 is an evil number, because the sum of its binary digits is even.

The product of its digits is 254016, while the sum is 47.

The square root of 12789947 is about 3576.3035385716. The cubic root of 12789947 is about 233.8601631211.

The spelling of 12789947 in words is "twelve million, seven hundred eighty-nine thousand, nine hundred forty-seven".