1002023105 has 4 divisors (see below), whose sum is σ = 1202427732. Its totient is φ = 801618480.

The previous prime is 1002023101. The next prime is 1002023119. The reversal of 1002023105 is 5013202001.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5013202001 = 53 ⋅94588717.

It can be written as a sum of positive squares in 2 ways, for example, as 285711409 + 716311696 = 16903^2 + 26764^2 .

It is not a de Polignac number, because 1002023105 - 2² = 1002023101 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1002023105.

It is not an unprimeable number, because it can be changed into a prime (1002023101) 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, 100202306 + ... + 100202315.

It is an arithmetic number, because the mean of its divisors is an integer number (300606933).

Almost surely, 2^1002023105 is an apocalyptic number.

It is an amenable number.

1002023105 is a deficient number, since it is larger than the sum of its proper divisors (200404627).

1002023105 is an equidigital number, since it uses as much as digits as its factorization.

1002023105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 200404626.

The product of its (nonzero) digits is 60, while the sum is 14.

The square root of 1002023105 is about 31654.7485379366. The cubic root of 1002023105 is about 1000.6739140711.

Adding to 1002023105 its reverse (5013202001), we get a palindrome (6015225106).

The spelling of 1002023105 in words is "one billion, two million, twenty-three thousand, one hundred five".