1993455 has 24 divisors (see below), whose sum is σ = 3569280. Its totient is φ = 1028160.

The previous prime is 1993441. The next prime is 1993457. The reversal of 1993455 is 5543991.

It is not a de Polignac number, because 1993455 - 2¹⁷ = 1862383 is a prime.

1993455 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1993457) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 681 + ... + 2109.

It is an arithmetic number, because the mean of its divisors is an integer number (148720).

2^1993455 is an apocalyptic number.

1993455 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1993455 is a deficient number, since it is larger than the sum of its proper divisors (1575825).

1993455 is a wasteful number, since it uses less digits than its factorization.

1993455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1471 (or 1468 counting only the distinct ones).

The product of its digits is 24300, while the sum is 36.

The square root of 1993455 is about 1411.8976591807. The cubic root of 1993455 is about 125.8545184083.

The spelling of 1993455 in words is "one million, nine hundred ninety-three thousand, four hundred fifty-five".