1023445993 has 4 divisors (see below), whose sum is σ = 1024079760. Its totient is φ = 1022812228.

The previous prime is 1023445991. The next prime is 1023445999. The reversal of 1023445993 is 3995443201.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1023445993 - 2¹ = 1023445991 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1023445991) 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, 314455 + ... + 317692.

It is an arithmetic number, because the mean of its divisors is an integer number (256019940).

Almost surely, 2^1023445993 is an apocalyptic number.

It is an amenable number.

1023445993 is a deficient number, since it is larger than the sum of its proper divisors (633767).

1023445993 is an equidigital number, since it uses as much as digits as its factorization.

1023445993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 633766.

The product of its (nonzero) digits is 116640, while the sum is 40.

The square root of 1023445993 is about 31991.3424694870. The cubic root of 1023445993 is about 1007.7550349686.

The spelling of 1023445993 in words is "one billion, twenty-three million, four hundred forty-five thousand, nine hundred ninety-three".