1386770669 has 4 divisors (see below), whose sum is σ = 1387346844. Its totient is φ = 1386194496.

The previous prime is 1386770659. The next prime is 1386770747. The reversal of 1386770669 is 9660776831.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9660776831 = 16657 ⋅579983.

It can be written as a sum of positive squares in 2 ways, for example, as 703575625 + 683195044 = 26525^2 + 26138^2 .

It is a cyclic number.

It is not a de Polignac number, because 1386770669 - 2²⁴ = 1369993453 is a prime.

It is a super-2 number, since 2×1386770669² = 3846265776797415122, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1386770669.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1386770629) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 284462 + ... + 289295.

It is an arithmetic number, because the mean of its divisors is an integer number (346836711).

Almost surely, 2^1386770669 is an apocalyptic number.

It is an amenable number.

1386770669 is a deficient number, since it is larger than the sum of its proper divisors (576175).

1386770669 is an equidigital number, since it uses as much as digits as its factorization.

1386770669 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 576174.

The product of its (nonzero) digits is 2286144, while the sum is 53.

The square root of 1386770669 is about 37239.3698792018. The cubic root of 1386770669 is about 1115.1540923998.

The spelling of 1386770669 in words is "one billion, three hundred eighty-six million, seven hundred seventy thousand, six hundred sixty-nine".