1353993 has 4 divisors (see below), whose sum is σ = 1805328. Its totient is φ = 902660.

The previous prime is 1353983. The next prime is 1354007. The reversal of 1353993 is 3993531.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1353993 - 2⁴ = 1353977 is a prime.

It is a D-number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1353973) 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, 225663 + ... + 225668.

It is an arithmetic number, because the mean of its divisors is an integer number (451332).

2^1353993 is an apocalyptic number.

It is an amenable number.

1353993 is a deficient number, since it is larger than the sum of its proper divisors (451335).

1353993 is an equidigital number, since it uses as much as digits as its factorization.

1353993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 451334.

The product of its digits is 10935, while the sum is 33.

The square root of 1353993 is about 1163.6120487516. The cubic root of 1353993 is about 110.6298031685.

It can be divided in two parts, 1353 and 993, that added together give a triangular number (2346 = T₆₈).

The spelling of 1353993 in words is "one million, three hundred fifty-three thousand, nine hundred ninety-three".