1308673 has 4 divisors (see below), whose sum is σ = 1310980. Its totient is φ = 1306368.

The previous prime is 1308649. The next prime is 1308691. The reversal of 1308673 is 3768031.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 986049 + 322624 = 993^2 + 568^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1308673 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1308613) 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, 361 + ... + 1657.

It is an arithmetic number, because the mean of its divisors is an integer number (327745).

It is a Proth number, since it is equal to 639 ⋅ 2¹¹ + 1 and 639 < 2¹¹.

2^1308673 is an apocalyptic number.

It is an amenable number.

1308673 is a deficient number, since it is larger than the sum of its proper divisors (2307).

1308673 is a wasteful number, since it uses less digits than its factorization.

1308673 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2306.

The product of its (nonzero) digits is 3024, while the sum is 28.

The square root of 1308673 is about 1143.9724647036. The cubic root of 1308673 is about 109.3814595369.

The spelling of 1308673 in words is "one million, three hundred eight thousand, six hundred seventy-three".