1308993 has 16 divisors (see below), whose sum is σ = 2021376. Its totient is φ = 738000.

The previous prime is 1308977. The next prime is 1309013. The reversal of 1308993 is 3998031.

It is not a de Polignac number, because 1308993 - 2⁴ = 1308977 is a prime.

It is an Ulam number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1308943) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1368 + ... + 2118.

It is an arithmetic number, because the mean of its divisors is an integer number (126336).

2^1308993 is an apocalyptic number.

It is an amenable number.

1308993 is a deficient number, since it is larger than the sum of its proper divisors (712383).

1308993 is an equidigital number, since it uses as much as digits as its factorization.

1308993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 844.

The product of its (nonzero) digits is 5832, while the sum is 33.

The square root of 1308993 is about 1144.1123196610. The cubic root of 1308993 is about 109.3903742198.

The spelling of 1308993 in words is "one million, three hundred eight thousand, nine hundred ninety-three".