1356993 has 20 divisors (see below), whose sum is σ = 2212848. Its totient is φ = 821880.

The previous prime is 1356973. The next prime is 1357001. The reversal of 1356993 is 3996531.

1356993 is a `hidden beast` number, since 1 + 3 + 569 + 93 = 666.

It is not a de Polignac number, because 1356993 - 2⁸ = 1356737 is a prime.

1356993 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1356913) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 130 + ... + 1652.

2^1356993 is an apocalyptic number.

It is an amenable number.

1356993 is a deficient number, since it is larger than the sum of its proper divisors (855855).

1356993 is a wasteful number, since it uses less digits than its factorization.

1356993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1546 (or 1537 counting only the distinct ones).

The product of its digits is 21870, while the sum is 36.

The square root of 1356993 is about 1164.9004249291. The cubic root of 1356993 is about 110.7114492311.

The spelling of 1356993 in words is "one million, three hundred fifty-six thousand, nine hundred ninety-three".