1023993 has 6 divisors (see below), whose sum is σ = 1479114. Its totient is φ = 682656.

The previous prime is 1023991. The next prime is 1024021. The reversal of 1023993 is 3993201.

It can be written as a sum of positive squares in only one way, i.e., 522729 + 501264 = 723^2 + 708^2 .

It is not a de Polignac number, because 1023993 - 2¹ = 1023991 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1023991) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 56880 + ... + 56897.

It is an arithmetic number, because the mean of its divisors is an integer number (246519).

2^1023993 is an apocalyptic number.

It is an amenable number.

1023993 is a deficient number, since it is larger than the sum of its proper divisors (455121).

1023993 is a wasteful number, since it uses less digits than its factorization.

1023993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113783 (or 113780 counting only the distinct ones).

The product of its (nonzero) digits is 1458, while the sum is 27.

The square root of 1023993 is about 1011.9253925068. The cubic root of 1023993 is about 100.7934543180.

It can be divided in two parts, 1023 and 993, that added together give a triangular number (2016 = T₆₃).

The spelling of 1023993 in words is "one million, twenty-three thousand, nine hundred ninety-three".