1993431 has 16 divisors (see below), whose sum is σ = 3000960. Its totient is φ = 1165920.

The previous prime is 1993417. The next prime is 1993441. The reversal of 1993431 is 1343991.

It is not a de Polignac number, because 1993431 - 2⁶ = 1993367 is a prime.

It is a super-2 number, since 2×1993431² = 7947534303522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1993441) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 85 + ... + 1998.

It is an arithmetic number, because the mean of its divisors is an integer number (187560).

2^1993431 is an apocalyptic number.

1993431 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1993431 is a deficient number, since it is larger than the sum of its proper divisors (1007529).

1993431 is a wasteful number, since it uses less digits than its factorization.

1993431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2126.

The product of its digits is 2916, while the sum is 30.

The square root of 1993431 is about 1411.8891599556. The cubic root of 1993431 is about 125.8540133353.

The spelling of 1993431 in words is "one million, nine hundred ninety-three thousand, four hundred thirty-one".