1306634677 has 4 divisors (see below), whose sum is σ = 1319571756. Its totient is φ = 1293697600.

The previous prime is 1306634663. The next prime is 1306634683. The reversal of 1306634677 is 7764366031.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7764366031 = 887 ⋅8753513.

It can be written as a sum of positive squares in 2 ways, for example, as 709369956 + 597264721 = 26634^2 + 24439^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1306634677 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1306634627) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6468388 + ... + 6468589.

It is an arithmetic number, because the mean of its divisors is an integer number (329892939).

Almost surely, 2^1306634677 is an apocalyptic number.

It is an amenable number.

1306634677 is a deficient number, since it is larger than the sum of its proper divisors (12937079).

1306634677 is a wasteful number, since it uses less digits than its factorization.

1306634677 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12937078.

The product of its (nonzero) digits is 381024, while the sum is 43.

The square root of 1306634677 is about 36147.4020781577. The cubic root of 1306634677 is about 1093.2464101425.

The spelling of 1306634677 in words is "one billion, three hundred six million, six hundred thirty-four thousand, six hundred seventy-seven".