1031993 has 4 divisors (see below), whose sum is σ = 1035300. Its totient is φ = 1028688.

The previous prime is 1031981. The next prime is 1031999. The reversal of 1031993 is 3991301.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3991301 = 37 ⋅107873.

It can be written as a sum of positive squares in 2 ways, for example, as 466489 + 565504 = 683^2 + 752^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1031993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1031999) 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, 1130 + ... + 1827.

It is an arithmetic number, because the mean of its divisors is an integer number (258825).

2^1031993 is an apocalyptic number.

It is an amenable number.

1031993 is a deficient number, since it is larger than the sum of its proper divisors (3307).

1031993 is an equidigital number, since it uses as much as digits as its factorization.

1031993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3306.

The product of its (nonzero) digits is 729, while the sum is 26.

The square root of 1031993 is about 1015.8705626210. The cubic root of 1031993 is about 101.0552584590.

The spelling of 1031993 in words is "one million, thirty-one thousand, nine hundred ninety-three".