1386947 has 2 divisors, whose sum is σ = 1386948. Its totient is φ = 1386946.

The previous prime is 1386929. The next prime is 1386949. The reversal of 1386947 is 7496831.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1386947 - 2⁶ = 1386883 is a prime.

Together with 1386949, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1386947.

It is not a weakly prime, because it can be changed into another prime (1386949) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 693473 + 693474.

It is an arithmetic number, because the mean of its divisors is an integer number (693474).

2^1386947 is an apocalyptic number.

1386947 is a deficient number, since it is larger than the sum of its proper divisors (1).

1386947 is an equidigital number, since it uses as much as digits as its factorization.

1386947 is an evil number, because the sum of its binary digits is even.

The product of its digits is 36288, while the sum is 38.

The square root of 1386947 is about 1177.6871401183. The cubic root of 1386947 is about 111.5201355178.

It can be divided in two parts, 13 and 86947, that multiplied together give a palindrome (1130311).

The spelling of 1386947 in words is "one million, three hundred eighty-six thousand, nine hundred forty-seven".