1023001993 has 4 divisors (see below), whose sum is σ = 1101694468. Its totient is φ = 944309520.

The previous prime is 1023001961. The next prime is 1023001997. The reversal of 1023001993 is 3991003201.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 50310649 + 972691344 = 7093^2 + 31188^2 .

It is a cyclic number.

It is not a de Polignac number, because 1023001993 - 2⁵ = 1023001961 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1023001997) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39346218 + ... + 39346243.

It is an arithmetic number, because the mean of its divisors is an integer number (275423617).

Almost surely, 2^1023001993 is an apocalyptic number.

1023001993 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1023001993 is a deficient number, since it is larger than the sum of its proper divisors (78692475).

1023001993 is an equidigital number, since it uses as much as digits as its factorization.

1023001993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78692474.

The product of its (nonzero) digits is 1458, while the sum is 28.

The square root of 1023001993 is about 31984.4023392653. The cubic root of 1023001993 is about 1007.6092829508.

The spelling of 1023001993 in words is "one billion, twenty-three million, one thousand, nine hundred ninety-three".