1386929 has 2 divisors, whose sum is σ = 1386930. Its totient is φ = 1386928.

The previous prime is 1386901. The next prime is 1386947. The reversal of 1386929 is 9296831.

1386929 is nontrivially palindromic in base 9.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1385329 + 1600 = 1177^2 + 40^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1386929 is a prime.

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 1386892 and 1386901.

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, 693464 + 693465.

It is an arithmetic number, because the mean of its divisors is an integer number (693465).

2^1386929 is an apocalyptic number.

It is an amenable number.

1386929 is a deficient number, since it is larger than the sum of its proper divisors (1).

1386929 is an equidigital number, since it uses as much as digits as its factorization.

1386929 is an evil number, because the sum of its binary digits is even.

The product of its digits is 23328, while the sum is 38.

The square root of 1386929 is about 1177.6794979960. The cubic root of 1386929 is about 111.5196530742.

The spelling of 1386929 in words is "one million, three hundred eighty-six thousand, nine hundred twenty-nine".