1385779 has 2 divisors, whose sum is σ = 1385780. Its totient is φ = 1385778.

The previous prime is 1385777. The next prime is 1385801. The reversal of 1385779 is 9775831.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1385779 - 2¹ = 1385777 is a prime.

Together with 1385777, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1385777) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 692889 + 692890.

It is an arithmetic number, because the mean of its divisors is an integer number (692890).

2^1385779 is an apocalyptic number.

1385779 is a deficient number, since it is larger than the sum of its proper divisors (1).

1385779 is an equidigital number, since it uses as much as digits as its factorization.

1385779 is an evil number, because the sum of its binary digits is even.

The product of its digits is 52920, while the sum is 40.

The square root of 1385779 is about 1177.1911484547. The cubic root of 1385779 is about 111.4888216320.

The spelling of 1385779 in words is "one million, three hundred eighty-five thousand, seven hundred seventy-nine".