12790381 has 2 divisors, whose sum is σ = 12790382. Its totient is φ = 12790380.

The previous prime is 12790361. The next prime is 12790399. The reversal of 12790381 is 18309721.

12790381 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 strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8608356 + 4182025 = 2934^2 + 2045^2 .

It is an emirp because it is prime and its reverse (18309721) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12790381 is a prime.

It is a super-2 number, since 2×12790381² = 327187692250322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12790301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6395190 + 6395191.

It is an arithmetic number, because the mean of its divisors is an integer number (6395191).

Almost surely, 2^12790381 is an apocalyptic number.

It is an amenable number.

12790381 is a deficient number, since it is larger than the sum of its proper divisors (1).

12790381 is an equidigital number, since it uses as much as digits as its factorization.

12790381 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3024, while the sum is 31.

The square root of 12790381 is about 3576.3642152331. The cubic root of 12790381 is about 233.8628082757.

The spelling of 12790381 in words is "twelve million, seven hundred ninety thousand, three hundred eighty-one".