1306993 has 4 divisors (see below), whose sum is σ = 1309860. Its totient is φ = 1304128.

The previous prime is 1306979. The next prime is 1306997. The reversal of 1306993 is 3996031.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 400689 + 906304 = 633^2 + 952^2 .

It is a cyclic number.

It is not a de Polignac number, because 1306993 - 2⁵ = 1306961 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1306997) 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, 580 + ... + 1717.

It is an arithmetic number, because the mean of its divisors is an integer number (327465).

2^1306993 is an apocalyptic number.

It is an amenable number.

1306993 is a deficient number, since it is larger than the sum of its proper divisors (2867).

1306993 is an equidigital number, since it uses as much as digits as its factorization.

1306993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2866.

The product of its (nonzero) digits is 4374, while the sum is 31.

The square root of 1306993 is about 1143.2379454864. The cubic root of 1306993 is about 109.3346335938.

The spelling of 1306993 in words is "one million, three hundred six thousand, nine hundred ninety-three".