1002403109 has 4 divisors (see below), whose sum is σ = 1006562700. Its totient is φ = 998243520.

The previous prime is 1002403099. The next prime is 1002403117. The reversal of 1002403109 is 9013042001.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9013042001 = 307 ⋅29358443.

It can be written as a sum of positive squares in 2 ways, for example, as 846228100 + 156175009 = 29090^2 + 12497^2 .

It is a cyclic number.

It is not a de Polignac number, because 1002403109 - 2⁴ = 1002403093 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1002402109) 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, 2079434 + ... + 2079915.

It is an arithmetic number, because the mean of its divisors is an integer number (251640675).

Almost surely, 2^1002403109 is an apocalyptic number.

It is an amenable number.

1002403109 is a deficient number, since it is larger than the sum of its proper divisors (4159591).

1002403109 is an equidigital number, since it uses as much as digits as its factorization.

1002403109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4159590.

The product of its (nonzero) digits is 216, while the sum is 20.

The square root of 1002403109 is about 31660.7502911728. The cubic root of 1002403109 is about 1000.8003955294.

The spelling of 1002403109 in words is "one billion, two million, four hundred three thousand, one hundred nine".