1002131323 has 4 divisors (see below), whose sum is σ = 1003621048. Its totient is φ = 1000641600.

The previous prime is 1002131239. The next prime is 1002131329. The reversal of 1002131323 is 3231312001.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3231312001 = 31 ⋅104235871.

It is a cyclic number.

It is not a de Polignac number, because 1002131323 - 2²⁵ = 968576891 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1002131297 and 1002131306.

It is not an unprimeable number, because it can be changed into a prime (1002131329) 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, 743853 + ... + 745198.

It is an arithmetic number, because the mean of its divisors is an integer number (250905262).

Almost surely, 2^1002131323 is an apocalyptic number.

1002131323 is a deficient number, since it is larger than the sum of its proper divisors (1489725).

1002131323 is an equidigital number, since it uses as much as digits as its factorization.

1002131323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1489724.

The product of its (nonzero) digits is 108, while the sum is 16.

The square root of 1002131323 is about 31656.4578403838. The cubic root of 1002131323 is about 1000.7099368704.

Adding to 1002131323 its reverse (3231312001), we get a palindrome (4233443324).

The spelling of 1002131323 in words is "one billion, two million, one hundred thirty-one thousand, three hundred twenty-three".