1307813 has 8 divisors (see below), whose sum is σ = 1457400. Its totient is φ = 1165248.

The previous prime is 1307809. The next prime is 1307821. The reversal of 1307813 is 3187031.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 12769 + 1295044 = 113^2 + 1138^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1307813 - 2² = 1307809 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 (1307833) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1358 + ... + 2111.

It is an arithmetic number, because the mean of its divisors is an integer number (182175).

2^1307813 is an apocalyptic number.

1307813 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1307813 is a deficient number, since it is larger than the sum of its proper divisors (149587).

1307813 is a wasteful number, since it uses less digits than its factorization.

1307813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3511.

The product of its (nonzero) digits is 504, while the sum is 23.

The square root of 1307813 is about 1143.5965197569. The cubic root of 1307813 is about 109.3574941234.

The spelling of 1307813 in words is "one million, three hundred seven thousand, eight hundred thirteen".